This. PVP has suffered far more and for longer because of PVE changes.
Considering those of us who play Frost weren't able to raid with it seriously from Sunwell until the release of MOP, I'm just going to have to shake my head in disbelief at that statement.
Turning PvP Power into a tuning knob would be a way to allow the damage of individual abilities to be adjusted up and down in PvP without affecting PvE at all. One of the constant points of contention is how much damage FOF-Ice Lance should do relative to Frostbolt: PvE players need FOF-Ice Lance to do a lot more damage than Frostbolt, not only because Ice Lance need to be something you want to use in rotation, but also because using it well needs to make a significant difference in performance over using it poorly. PvP players want Frostbolt to be the preferred cast against frozen targets, because they want to be rewarded for hardcasting.
If PvP Power were a tuning knob, it would be possible to make adjustments to shift priorities like this. Instead of having the current situation:
Frostbolt: 125% Spell Power, 100% PvP Power
Ice Lance: 25% Spell Power, 100% PvP Power
They could make adjustments like this:
Frostbolt: 125% Spell Power, 200% PvP Power
Ice Lance: 25% Spell Power, 25% PvP Power
...thus shifting Frostbolt up and Ice Lance down in PvP without having any effect at all on PvE. And it accomplishes this without creating separate rules in the two environments, and without making playstyle-wrecking changes to PvE like the suggestions we usually see.
Find answers to questions about Mage mechanics inLhivera’s Compendium