As KnifegaF said, Themporal contraction hasn`t suffered a lot form this nerf. With Acceleration you stil has 3 turns of the same speed boost, which enough for most fights. I was playing the same build on dominating, but dropped it when started expedition, cause without any offensive psi or Three-pointer you will really struggle with Sørmirbæren villages and Fetid Marsh cause of lack of decent AOE. Still, TM Sniper is a really interesting build, which depends on yours brain to win tough fights. Also, about critical, if you not taking Survival Instincts, or not relying on Ambush (which is really easy to trigger), you will be having 83-85% critical chance with focus stim, feats, rathound armor, tatoo, googles, and hardcore chips (Unless you spend invaluable for sniper specialization points into recklessness), and we all know the difference between 85% and 95% or 100% chance to do something in this game. Big critical chance still a good bonus for build tho.
BTW Pseudo-spatial Projection is a pain for a pure sniper.