Hello i've always loved sorcerers in 5e but it always felt like they lack in amount of spells they get. My newest play as a clockwork soul sorcerer actually confirmed this to me and as i searched for other opinions it made it clear that im not allone in this so i've decided to give each pre-Tasha official subclass an extended spell list what is your opinion of them? feel free to discuss or use in your campaings!

Wild Magic

You learn additional spells when you reach certain levels in this class, as shown on the wild magic Spells table. Each spell counts as a sorcerer spell for you, but it doesn’t count against the number of sorcerer spells you know. These spells can’t be replaced when you gain a level in this class, instead whenever you gain a sorcerer level you roll 1d8 for a particular level on the chaos spells table and you can choose to replace one of the two spells with the new one in that spell level.

Wild magic Spells table

Sorcerer Level                  Spell level                     Spells

1st                                           (1)                             Absorb elements, Chaos bolt

3rd                                           (2)                             Alter self, Lesser Restoration

5th                                           (3)                             Protection from Energy, Hypnotic Pattern

7th                                           (4)                             Polymorph, Confusion

9th                                           (5)                             Telekinesis, Destructive Wave

Chaos spells table

Shadow Magic:

Since you have surrendered to the darkness, you are able to use its maximum potential and thus gain certain spells at certain levels. These spells don't count against the number of spells you have, but you can't exchange them for other spells like your sorcerer spells.

Sorcerer level                         Spells

Cantrip                                    Toll The Dead

1st                                           Bane, Hex

3rd                                           Shadow Blade, Silence

5th                                           Fear, Hunger Of Hadar

7th                                           Blight, Death Ward

9th                                           Dream, Antilife Shell

Draconic Bloodline - Draconic inheritance

Your draconic blood gives you some inner magic based on color of your ancestors

when you reach certain levels in this class you gain new spells which does not count against your sorcerer spells
Also when you reach 3th level in sorcerer, you gain dragon’s breath spell which requires no spell components.

Storm Sorcery

Your magic comes from the very nature of the elements like weather and storms. 

When you reach a certain level in sorcerer, you gain one spell of your choice from the expanded spell table. This spell does not count against the number of spells you know, and when you reach a new Sorcerer level you may exchange one of these spells for another spell of the same level from the school of evocation.

In addition, each day at dawn you gain spells of level that you have access to in the extended spell table, depending on the type of weather (weather can be combined: e.g. sunny + rainy).

Weather spells

Divine Soul

divine magic

Your potency comes from divine power and therefore has similar effects.

Each morning you may choose one spell for each spell level you have access to from the cleric's spell list.

For example: a level 5 sorcerer can choose one first level spell from the cleric's spell list, one from the second level, and one from the third.

the maximum level of spells obtained in this way is level 5