did some testing with the "new rogue things" and it seems to work in terms of the messages and the 100% accuracy when an opening happens.
as for the damage of the backstabs themselves....yeahhhh im not sure if its jsut awful luck or odd coding but overall the backstabs done via "sneak attack" seem to either not get the bonus or actualy do the reverse and lower damage done. i opened up my logs and the following is a general view of what i got:
3165, 2953, 3533, 4272, 2452, 3348, 1331, 2887, 8464, 2162, 2835, 2755, 6460, 1528, 5456, 2861, 3058, 3058, 7780, 6564, 1806, 8070, 3991, 1256, 1986, 4170, 1671.
as you can see these numbers seem rather low aside from the few that were over 5k (the 7 and 8k's were insidious stabs). the only explanation is either a bad code somewhere or some sor tof gear error causing the 4.3 poker to not be httign a sahrd as it should be (i doubt the stat patch thing that happened with this had any effect like this but never know)
as for the "got em'" hits i got as folows:
8088 (insid), 2574, 2000, 1547, 4556, 1133, 3502, 1266, 3924, 1044, 907, 1867, 3668, 3138, 1171, 1348, 2183, 3017, 1107, 1107, 2363, 1688, 1951, 2532, 801.
again it seems the BS damage is being reduced somehow which again either points to a bad code or backstabs in general being a bit wonky since patch.
for referance all of this testing was done with reinhardt via crac'tees and river alligators in remnants of old ikild.