I dont know, has anyone confirmed it on Chironic?
I'm reasonably certain DM augments don't differentiate between sets at all. I've had block chance, snapshot, rapid shot, etc on Merlinic gear for crying out loud.
Speaking of which:
-Block chance goes to +10. WSD probably does as well, definitely to at least +9.
-I have a Phalanx+4 augment, not sure if it goes to +5 or not.
-(P/M)DT augments still occur at a low rate; I got DT-4 Herc hands from a DM aug.
-I've seen triple stat augments before, ie INT/MND/CHR+7. Not sure if the possibility of such a roll exists for a single slot or if DM just free rolls on a bunch of different slots.