That's what I thought. In retrospect the potency buff is pretty trivial comparatively. A KC build is going to be double slashing all day for the particle acceleration proc. 15% wins there. Balance or anything with the +50% crit damage is an easy win for the 15% buff. Even infiltration is going to open with two clairvoyant strikes and continue using them all game. You are basically talking about having one extra crit on demand versus having multiple crits occur. How many times do you typically use double slash/clairvoyant strike in a 75 second interval? Enough to easily counterbalance one extra on demand crit.
That's what I'm thinking at the moment anyway. It might change, but right now I'm delighted with it.
It seems to be a case of sustained vs burst, to be honest. Specifically with infil or infil hybrids. Nevertheless, I'll throw off the pre conceived notions and try it out for fair results.