Well, I am currently running a thief who uses temporal & psychokinesis offensively. I just don't see the point of blitz for distortion stacking. Psycho-temporal contraction & acceleration & adrenaline should give you 90 ap for 3 rounds, and with tranquility the distortions cost 15 ap. Blitz would give you only a bonus of 20 ap in the first round on top of that, that's just one distortion more. Use these stat points to get 6 dexterity instead, invest a bit in throwing and get grenadier, because that with Limited Temporal Increment is kind of bonkers.
Though I agree that distortions are more of a single-target killer. But with grenades spam that's not much a problem, especially fi you add traps and caltrops into the mix.
edit: I also don't see the point of not maxxing psychokinesis. There is more synergy between these two schools then just hiding behind a force field, while you wait for distortion ticking. Entropic Recurrence is another "delayed damage over time" temporal ability that scales with skill. But you need a "one hit" spell to do some proper damage, such as telekinetic punch (with force user). Then add the telekinetic proxy, which is on a one turn cooldown, but hey, you have Limited Temporal Increment!