As a Tank, what would you want in the next raid? *Savage

[Ralvenom]

Even at a higher %, Parry is still RNG. With larger autos you'd just end up with over healing, less healer DPS, and a lot of spiking.

Actually...if they do it right, it won't work out as such. Back in the days before Active Mitigation in WoW, it worked thusly: 30% Parry meant you reduced 30% of all attacks (except tank busters) by a percentage. The difference was, str gave parry. So, tanks felt a difference, even if they weren't stacking parry (which none of them were).
Right now, despite what people think, parry isn't actually useless. It's just that the AS encounters are mostly magic damage. There's very little physical damage, and boss/add autoattacks are hardly a consideration. If the encounters were changed in the next Savage raid (adding more physical damage and making autoattacks noticeable), then parry would become useful. As it is now, why bother with a stat that won't block boss abilities?