Should whips be put into tier 2?
Seeing how effective they are, and how tier 1 marines struggle against structures, should aliens really have whips, crags and hydras all available from the get go? I know there's the problem with upgrades depending on the whip, but I'm sure that can be taken care of.
This is the kind of thing that goes on behind close doors on normal game releases, where they are optimizing it right up until the end. You guys are just getting to play with a version of the game that normally only the developers see.