Looking at the others, I thought of a few things.  What do you all think?

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Dwarf: +2ASI, Darkvision, Dwarven Resilience, Stonecunning; Dwarven Combat Training, Tool Proficiency, +1ASI, Dwarven Toughness OR Dwarven Armor Training

Elf: +2ASI, Darkvision, Fey Ancestry, Keen Senses, Trance, +1ASI, Elven Weapon Training; a Cantrip and Extra Language OR Fleet of Foot and Mask of the Wild

Halfling: +2ASI, Lucky, Brave, Halfling Nimbleness; Naturally Stealthy OR Stout Resilience

Gnome: +2ASI, Darkvision, Gnome Cunning; Stone Camouflage and Undercommon OR Natural Illusionist and Speak with small beast, OR Artificer's Lore and Tinker

Half-Orc: +2ASI, Darkvision, Menacing, Relentless Endurance, Savage Attacks

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1st thing: (+2, +1 ASI) needs to be for humans too and outright; not (+1, +1, +1 after the feat).

2nd thing: Darkvision is replaced by --> Lucky in halflings, The Feat in Humans:  

3rd thing: [Dwarven Resilience = Fey Ancestry = Brave & Stout Resilience = Gnome Cunning] i.e. this race has advantage to saves against X

4th thing: [Stonecunning = Keen Senses = Artificers Lore = Menacing] i.e. this race has a skill proficiency or expertise.

5th thing: Things are starting to diverge a bit now.  The extras I see are 2 with extra language, 2 with weapon proficiencies, one with armor proficiency, 2 with hiding, 2 with tool proficiency, and 2 with a cantrip or two.

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If custom lineage is going to give every race a bonus feat too, then I suggest upgrading the human bonus skill proficiency to the Prodigy feat instead and then have the standard bonus feat slot still available in addition to it. 

Prodigy let's you pick a skill and not only be proficient with it, but expert, and it comes with a tool proficiency too, as well as a bonus language - such as high elves have.  This will allow a healer for example to have proficiency with a healing kit, if they don't have it from background or another source, and a third language makes sense for a species that does business with everybody else.  

Prodigy would cover 4, & 5 - at least in part:  I would also suggest perhaps something like: 

Versitle Training: Choose One option from the list Below

1. Special Weapon Proficiency: You are proficient with the use of a Net and/or a Lance

2. Light Armor Proficiency: (So we can play sorcerer/wizards without having to wait for Elven Chain or multiclass or waste a feat slot just to have some armor.)

3. Vehicle Proficiency: You are proficient with Carts OR Chariots.

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Regarding a human equivalent for saving throws against X"

There was something along the lines of 'multiclass specialist' in ~2e? humans and in 3e I think it applied to exp gains, but never mind that.  I suggest something like that be added which lets you use a 3rd save proficiency you might otherwise have had access to if you began as that class rather than the other. 

For example, my level 3 character is a level 2 bard, level 1 life cleric, the order was bard, cleric, bard, - not cleric, bard, bard.  As such my saving throw proficiencies are Dex and Cha versus Wis and Cha. 

The human trait of multiclass specialist, would allow this character to have a Dex, Wis, & Cha, without having to waste a feat slot on resilience for Wis (also passing up the rest of what resilience gives. - basically this suggests making half of resilience, like prodigy, a human starting feat but not with full versatility of just getting any 3rd save proficiency, rather it has to be tied to your class'es specific training and adds only 1 more save even if your multiclass has 2 other available saves or you multiclass into a 3rd class. 

This is slightly wider than a specific type of save, but it's close to the idea that if every other race has some kind of saving through proficiency by biological default, humans would have to do something to keep up, and so train all the harder or like regularly take a drop of poison to slowly build a natural immunity like dread pirate Roberts / Westly did for iocane powder.  - or something to that effect.

What I did to the standard human specifically was give them an extra trait, similar to what you've described here.

> Versatile Specialty

> You gain proficiency in one skill and set of tools of your choice. You also gain expertise in one skill or tool that you are proficient in.

I think the variant human is fine tbh. I do however think that your idea of "multiclass specialist" is a ******* FANTASTIC idea. Even if I don't like multiclassing lol.

Prodigy let's you pick a skill and not only be proficient with it, but expert, and it comes with a tool proficiency too, as well as a bonus language - such as high elves have.  This will allow a healer for example to have proficiency with a healing kit, if they don't have it from background or another source, and a third language makes sense for a species that does business with everybody else.  

You don't get proficiency in a healer's kit. That's not something you can get as a prof.

3. Vehicle Proficiency: You are proficient with Carts OR Chariots.

The vehicle profs are Land, Water, and Air. There's no distinction based on the specific vehicle otherwise.

Maybe for the standard human they could also have something like this:

> Motivated

> When you use Inspiration on a d20 roll and the d20 roll fails, you don't expend your Inspiration. Once you use this feature you can't use it again until you expend your Inspiration

> Additionally, you can have up to two instances of Inspiration at a time instead of just one.

Quote from Lycaon1765p >>

 

I think the variant human is fine tbh. I do however think that your idea of "multiclass specialist" is a ******* FANTASTIC idea. Even if I don't like multiclassing lol.

You don't get proficiency in a healer's kit. That's not something you can get as a prof.

 

The vehicle profs are Land, Water, and Air. There's no distinction based on the specific vehicle otherwise.

 Thanks ;-)

Aw, that's a bummer.  I wondered why I couldn't find it.  I thought perhaps I just hadn't unlocked it yet.

Ah, Land then.  Unless perhaps you have the pirate/sailor background.  I just didn't want to go too overboard.

For my campaign world, this is what I have come up with currently so far. 

Humans

Ability Score Increase. +2, +2, or +2, +1, +1

Creature Type. You are Humanoid

Size. You are Medium.

Speed. Your walking speed is 30 feet.

Extra Language. You can speak, read, and write one additional language of your choosing.

Human Determination. When you make an attack roll, an ability check, or a saving throw, you can do so with advantage. You can use this trait a number of times equal to your proficiency bonus, and you regain all extended uses when you finish a long rest.

Skill Monkey. You gain proficiency in one skill and two tools of your choice. Choose one of these skill or tool proficiencies. Your proficiency bonus is doubled for any ability check you make that uses the chosen proficiency.