I'm pretty sure this was already brought up, but why are skulks nerfed so hard in the late game?
4 bites to kill a marine with armor 3 means the skulk has a very slim chance of winning a fight. Not the mention how useless Xeno is right now, with the huge delay to activation (cancelled by attacking) and low damage.
Nerfing the base unit like that is a really uninspired idea. Devs, please take a moment to dissect the units in SC2 and their utility (neither marines, nor zerglings are ever completely obsolete, with passive weapon/armor upgrades for both, plus stim/combat shields, respectively speed/cracklings upgrade to keep them relevant in late game).