As I said, those changes would make us 'viable' due to utility (in the same way shamans currently are), not optimal. It'd simply be accepting the reality that our nerfs were massively shortsighted. I also conceded we'd still struggle for progress spots ;p. At the moment on ptr there's zero reason to bring us, even for the utility. The ONLY reason in the CURRENT state to bring us, would be if ret and prot were destroyed to the point it made more sense to bring a holydin than either. It was more a tongue in cheek comment than a serious suggestion though. (second time we've had one of these misunderstandings; i'm guessing sarcasm doesn't translate well on the internet.)
Realistically, if there's not serious ptr change within a couple of months, I think most 'casual decent' guilds will be rethinking their setups to not include a holydin.