Interesting that they added radiant damage now. I guess because they are sort of a paladin at this point? Pretty neat

I think it's because these are specifically royal knights of the Kingdom of Celene

While I'm a big fan of not feeling like monsters have to abide by the same rule as players, I do think being able to swap out a two handed sword for a two handed crossbow mid attack very flavor breaking. I wish they had just given him javelins.

DCR is 2, OCR is 4, finally an actual CR correctly calculated. 

Why does it do 2d10 damage for its heavy crossbow? Shouldn't it do 1d10?

Not understanding where the radiant damage is coming from

Um, I just wanted to point out that the picture is of Darreth Highwater From Dragonlance shadow of the dragon queen 

Quote from Drewschebag >>

Not understanding where the radiant damage is coming from

 Knights are now specifically paladins it looks like. If you want a regular fighter it would be the warrior veteran or maybe guard captain. Same with Questing knight being a high-level paladin while warrior commander is a high-level fighter.

Quote from theron >>

Quote from Drewschebag >>

Not understanding where the radiant damage is coming from

 Knights are now specifically paladins it looks like. If you want a regular fighter it would be the warrior veteran or maybe guard captain. Same with Questing knight being a high-level paladin while warrior commander is a high-level fighter.

 Knights are not specifically Paladins. Like all monsters, their class, if any, will be stated in the Stat Block. (See Archmage, "Medium or Small Humanoid (Wizard).")

Knights are simply monsters with the aforementioned Stats. For the same reason that a Cultist can use Wisdom as their spellcasting ability without being a cleric or druid, Knights can inflict radiant damage without being a paladin. A creature may have all of the indicia of a class, but that does make it that class.

Quote from FFox1604 >>

Um, I just wanted to point out that the picture is of Darreth Highwater From Dragonlance shadow of the dragon queen 

 Hi! I can see how this may look like Darrett. Maybe just a coincidence with skin+hair+partially covered face. I painted it just as a female knight and not a particular named character. If it was Darrett I definitely would have made him taller and more slender.

Quote from Amalica >>

DCR is 2, OCR is 4, finally an actual CR correctly calculated. 

Do you know the YouTube Channel "DND CR Exposed (opens in new tab)"?
It does precisely these analyses - I can recommend it very warmly :)

Quote from TheOtherRyan >>

Quote from theron >>

Quote from Drewschebag >>

Not understanding where the radiant damage is coming from

 Knights are now specifically paladins it looks like. If you want a regular fighter it would be the warrior veteran or maybe guard captain. Same with Questing knight being a high-level paladin while warrior commander is a high-level fighter.

 Knights are not specifically Paladins. Like all monsters, their class, if any, will be stated in the Stat Block. (See Archmage, "Medium or Small Humanoid (Wizard).")

Knights are simply monsters with the aforementioned Stats. For the same reason that a Cultist can use Wisdom as their spellcasting ability without being a cleric or druid, Knights can inflict radiant damage without being a paladin. A creature may have all of the indicia of a class, but that does make it that class.

 Exactly this, good answer.

Kay, but common sense Dictates that the radiant damage is coming from them being low level paladins or paladin adjacent. Those tags mean nothing. I can find a dozen wizards that don't have the wizard tag, and at least as many creatures with the tag for a specific spellcasting class, that have no spells from the class they're labeled as. The " Official" Label was never a good way to measure what an NPC is in 5e, and so far it's no better with 6e. If anything its less accurate, as they don't specify where things like armor class come from anymore, so who knows if it's innate features or equipment boosting it.

Quote from Matt77stock >>

Kay, but common sense Dictates that the radiant damage is coming from them being low level paladins or paladin adjacent. Those tags mean nothing. I can find a dozen wizards that don't have the wizard tag, and at least as many creatures with the tag for a specific spellcasting class, that have no spells from the class they're labeled as. The " Official" Label was never a good way to measure what an NPC is in 5e, and so far it's no better with 6e. If anything its less accurate, as they don't specify where things like armor class come from anymore, so who knows if it's innate features or equipment boosting it.

 That's the rub, though; EVERYTHING a statblock can do is innate.  Their weapons can deal more damage and/or other damage types, their hit points are arbitrary, etc. You don't really NEED an explanation for why a Knight can do radiant damage or why a Beholder can fire a death beam AND a disintegration beam. They just can, end of.

Wait... these guys are crossbow masters?
Two attacks at 2d10 + 1d8 a turn? 
Sure the accuracy is wonky but... why not just give them longbows and +1 dex? Big, swingy damage on rapid-firing heavy crossbows, and lugging that thing around when you already have heavy armor just seems... strange, and prone to both innate damage swing (3-28 damage) and nasty friggin crits. (6-56 damage)
One might even call it poor game design, with how inconsistent and strange it is.

Is it a knight or Paladin with that radiant damage? A little strange. 

Size is changed to accommodate for the smaller races. Lost the Brave feature in turn for straight immunity to frightened. Used to know any one language, now they know Common plus another one. 

Multiattack is reworded. It used to read "The Knight makes two Melee attacks." Now, it says that they can use two attacks in any combination. 

Greatsword gained the strange radiant damage, but is otherwise unchanged. The Heavy Crossbow's damage die is doubled, but has no modifier. Is it dex based? Also got the radiant damage. 

Lost the Leadership ability, but gained Parry. 

New knight isn't bad, but there are a few things wrong with it, in my opinion.

Fusion time! Remove that radiant damage or say that this is a Paladin. Simple as that. Bring back the Leadership ability that would add a d4 to an attack roll or saving throw if an ally is within 30ft. of it.