It seems to me 5.2 Needs to release. I understand they don't want to release it until most people are ready but from what I see on my server most people are beyond bored with the pvp content right now. We need the new gear so we have something to work towards. Granted some of my friends and I still need a few pieces but with 5.2 so close it seems almost worthless to go after it.
Unsure how much more of the new raid needs testing, so I can't comment based on that. Plus the PTR appears to still be up.