The problem with PA in this game is not that you get it early. The real problem is that it's ridiculously easy to get the T-60 suit too early, and basically skip the T-51 "tier" of PA pieces.
The Cabot House questline.
It had the potential to give the player cool psychic powers and more alien weapons. Or at least the cool hat the old guy had. I guess that serum was cool though...