Quite noticable change with patch 2.3 is the reduced hunter dead zone. I'm actually
not certain where I stand on this.
From one perspective, I like it because now I can deliver my damage over a much wider range of mob distances. There will be less scrambling backwards to allow myself to open fire. In tight quarters like caves or instances, there will be much more terrain, positions, and time available for me to do "ranged" damage.
There's a big part of me that doesn't like the change.
I think the dead zone was part of the challenge of being a hunter, and was a big differentiator between melee hunters and hunters who understand that max damage is delivered from range. Now, with no thought or understanding, a very unsklled hunter can still deliver max damage while standing on the feet of the mob.
I guess good PvE hunters will still be backing up as often as possible, to stay out of melee range and keep the aggro gain threshold where it belongs, at 130%.
I'm not really into PvP, and I'm betting my opinion would be dramatically if I were.