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I think that would be great.
I just definitely don't think that the concepts of leveling the playing field or equalizing gear
in any of the ways mentioned in the OP
would lead to that.
The game could, like GW, focus on people 'perfecting' their builds rather than 'gaining direct power', with all 'direct power' being leveraged through nodes, or Guild Perks (which presumably might disappear in Arena matches, but then it's the same thing if they choose perks that affect combat, for whatever reason).
But if it DID do that, there would be no need to equalize that much. It would just be like playing a very slow MOBA. Gear for your bracket, perfect your gear, compete, repeat.
And without the 'concern' that the best Warlock on the server' is 'nerfed' in PvP arena because their Legendary Staff of Resna's Blessing isn't 'allowed' even though it isn't actually explicitly 'superior' to other staves.
I would say that any such requests or appeals to Intrepid would be better focused on getting them to do the gear itemization in a way that prevents the whole 'you beat me through your Objectively Statistically Better Gear' problem outright.
We need some more Diagonal Progression (this is an in-joke, you can ignore it).