The thing I hate the most about it from what I've played on the PTR is that I feel like I've been slowed down and that's with the fires of justice talent without that talent I find it intolerable. But I think the lack of Hammer of Wrath and the exorcism/divine storm procs which made things interesting is really hurting the class. I felt like I never had much on cooldown in WoD ret whereas in Legion ret it feels a lot slower and like I'm waiting for cooldowns. Maybe it's just me but its slower, I have less utility now and I'm having less fun.