few small suggestions

[Icehammer]

3. I suspect this is already happening, but touch up some of the classes/specs that were most effected by the monster HP increase. I don't have any direct experience to go off of here. But I have heard poison necro, cold sorc, light java, and light sorc mentioned as candidates for adjustment.

Psn necro now sucks. With Xardas, we have tested a lot of stuff to make it great again as starter to farm DL/LK/TR but we could do nothing much than get a lot of psn pierce and with that, still taking a lot time and pattience kill Knarst or Mappo.
I remember that in 4.2 was one of my favourite chars to use cuz it was easy to build and cheap too but now is only a decorative build that can support you in groupal games. Try to do LK or TR alone, but even with a almighty gear, it will takes a lot of time.
Hope all the chars affected by the monster HP increase receives a bit buff too, at least.