not as far as i know, the only real changes from 1.10 to 1.12 are the cd thing, and the marrowalk boots glitch fixed. well, that i know of anyway.
*edit*
so i pimped my merc out, and he loves me now.
not quite sure what to fill the other socket with, the amn is for 7% life leech, i may stick another amn in there or if i get another shael i could pop that in there.
the armor covers damage reduction (shaftstop)
the helm covers crushing blow/deadly strike (Guillaume's Face)
so the weapon will cover leech, and RAPE
and you can faintly see in the screenshot that he does about 1k-4k damage, add in the deadly strike, bone spear proc, and crushing blow and he is no longer human, he is 100% rape.
ohh and did i mention he provides my skeletons with might aura? making them rape too, yeah, then stack that with amp damage that i liberally apply onto every non boss enemy and i think im doing pretty well with this character.