So balance and fun in pvm isn't something those people who don't care about pvp will want? I personally would say that a balanced pvm experience would be a far more fun experience. Having challenging encounters and having to think about using one's tools would be more fun in my mind than the meaningless grind that 98% of pvm is today.
Better balance and numerous changes, especially nerfs, are a part of that.
Nerfing is required heavily in almost every area of the game. You can complain that you'll be nerfed, but the overall experience of everyone involved will be better. So what do you want most, a game where you're insanely overpowered, can kill almost anyone easily, except similarly overpowered people, or a game where things require you to think about your moves and act accordingly with the events going on, with time to think other than a few split seconds of an alpha kill, and a more varied set of possible setups. I personally would go for the latter, regardless of the fact that compared to the present, my main character will be nerfed to hell. But point is, I'm not looking at the present, but the future. And hey, even if it isn't perfect balance from the get-go, we have all this work laid out detailing the direction that things are meant to be moving in, and a willingness to change things instead of letting them sit written in stone. Meaning that we'll very likely see swift action taken following the rebalance act to properly execute the move from overpowered 3 professions online, to more of everything online.