VR is a nice change for prot warriors leveling I had zero down time being prot leveling up and the heals from it untalented was right high from what I can remember.
From my 5 man exp I speced into the talent to use it below 20% of the targets health and for now it seems to be helping the healers. That is because during that part of the fight healers currently are having mana issues but that could go away when things progress.
The item I dislike is the heal from talents is not as great as other classes. If anything I wish the talent turned VR into a CD so at least we could keep it timed and avoids issues with certain fight mechanic's. I.e. blood prince I was proccing off of mobs that the 1 health point. Plus right now the proc is off the least used ablity while tanking past keeping up the debuff of sunders.