Not according to the Monster Manual statblocks for guard, mage, acolyte, etc...
If you notice, I didn't include the centaur abilities in the mechanical changes, either. Training explains those differences.
The only thing which bothers me is size. I get that it's mechanically easier to cleave to the idea that all player characters are Medium, but I'm pretty sure my table can handle a little bit of napkin math to accommodate a Large character.
But you specifically pointed out an issue with the NPC/monster Centaur having a different ability score line than the PC Centaur. Do you withdraw that objection when it comes to dwarven guards/acolytes/mages/etc?
Those NPCs are somewhat different than the centaur. They aren't the same as a full monster version. The NPCs get built similar to how a similar level PC would advance. With not only racial bonuses assumed, but ASIs as well. The centaur is not built like a class as it's a monster.
It has choice weapons and a fighting style. I think it's safe to assume that the Centaur in the Manual is a warrior class.
You must have a different MM than I do. I don't see fighting style or choice of weapons. It has a pike and a longbow and gets +6 with the pike, 4 from strength and 2 from proficiency. Then +4 with the bow, 2 from dex and 2 from proficiency.
Apologies, I meant to use the more general meaning for Fighting Style, not the fighter class ability. I'd still argue that the Centaur enemy has access to a special "Centaur Warrior" class which the players do not have access to. Maybe it increases strength with training, et cetera. I see no issue here.
Kobolds do. You just have to imagine that all the thugs are very tall kobolds with some sort of sunglasses.
