I think that they're just going to be careful not to call the Orc Warrior simply "Orc". And that goes for all of the sentient species. It may have been simple (and I think that was the real reason for the usage) but calling something "goblin", "orc", or even "bugbear" instead of something like "goblin raider", "orc warrior", or "bugbear ambusher" just seems... reductive to a modern eye.
It makes the game "sound" more 4e - but that's because it was was something that they'd solved in 4e, and it wasn't for no reason.