Gear and buffs ARE totally relevant for the discussion. You don't tank Erebor raids (which are the only content difficulty that seems to be slightly balanced) with DPS gear, do you? And once the difficulty of all the content has been fixed, tanking gear will be needed in most Raids. So yeah, of course you have to have Tanking Gear/Threat relation in mind.
There was an obvious damage increase in HD which is totally justified by the lack of other threat resources as we used to have.
Hence the need of that increase of DPS explained by Deviled Egg in Beta, as you well know. Again, take a look at the parses, tell me how OP damage we are dealing while fully geared for tanking.
What you don't seem to understand is that lowering damage just with PvP in mind will deeply affect PvE: if you lower the damage in Blue Line, you'd put Warden's threat in a really bad situation. But sadly that doesn't seem to bother some people at all.
The problem here is PvP, period. That's why all this discussion has come up. But that's a problem of fixing the damage type /mitigation bypasses in both sides - not lowering the class' damage.
Those who want to change a class for their own interests in PvP do more harm to the quality of the class in PvE than the Devs ever had.