In terms of fire mages, and destro warlocks. I’m mainly speaking from the PvP perspective of being taken down by a proc, which requires literally zero skill, or abilities being ridiculously enhanced by corruption. While that can be boiled down to the corruption system, which was another one of my points, there are still fundamental problems there.
Even more so with cases like Guardian Druids, where me (A frost DK in 8.3) and a fury warrior couldn’t even dent their health, and got wiped out in arenas by a single bear.
I think the reason why customization is a lot more commonly seen is because, there’s an absolutely massive variety of things there, whereas with many of the problems with gameplay have solutions that can boil down to… fixing the issue. It’s a lot more black and white, than customization is.