Besides the fact I question if the pool of 200-300 wont be too large on itself, I also question if those players have the average gamer in mind. (Not all of them follows builds)
However I did miss what both you and the dev’s think what should consider the acceptable range players should get in terms of arena/corruption.
So if you double/tripple or go even go further than this, nobody should surprised an ogre with a nerfclub comes along. (speaking in general terms here, not your build).
Based on this I will wonder if all 200-300 people will agree with a stance like (random numbers), no build should ever achieve either 500 arena (or corruption)!
at the same time you might say any non-freak build should be able to do at least 250 arena (or corruption) (again random numbers, nor do I advocate that 500 arena=500 corruption)
I just try to figure out what you/the devs and the rest of the players think what the min-max range of player power should be, without this discussion acting surprised when builds gets nerfed is odd.