Halflings don't seem to get Halfling Nimbleness (though that is because it probably isn't too relevant in the CRPG)
Lightfoot Halflings now get Stealth proficiency rather than Advantage when hiding behind larger creatures.
The Half-Elf optional subraces have entirely replaced the PHB Half-elf (who got 2 free-choice skill proficiencies instead of Mark of the wild or the High-Elf Cantrip).
Similarly Drow are an Elven subrace (and to be honest I can't see any good reason why they have decided to change that - Both Seldarine Drow and Lolth-Sworn appear to be identical so it can't be just so that they could have separate Drow subraces).
Human's are accurate as far as I can tell, but are missing the Human variant option. I don't think I have actually seen anyone use the standard PHB Human in game (it's not banned or anything, just not used).