I'm down for less sneak attack, and I think that reduction could be paired with a distracting strike class feature.
2nd-- poison resist +2, sneak attack +1d6, distracting attack (as rogue talent)
3rd-- investigator talent, keen recollection, trap sense +1
4th-- swift alchemy
5th-- investigator talent, poison resist +4
6th-- sneak attack +2d6, trap sense +2
7th-- investigator talent
8th-- poison resist +6, some upgrade to distracting attack (ie target is flat-footed to up to a number allies equal to the number of sneak attack dice, but still not yourself)
9th-- investigator talent, trap sense +3
10th-- sneak attack +3d6
11th-- investigator talent, poison immunity
12th-- trap sense +4
13th-- investigator talent
14th-- sneak attack +4d6 (and +5d6 at 18)
add a talent (available at 9th) which makes you able to benefit from your own distracting attack with your iterative attacks.
another talent to be able to spend an inspiration to use distracting strike on a foe without requiring the conditions appropriate for sneak attack.