The thing that annoys me about the Warden is that they're all earth earth earth. C'mon. There's more stuff to do than Earth. Too many powers named Earth are going to get confusing. They need some Wind and Water stuff. They allready have a Thorn strike, so some plant based attacks work.
Swamp Thing.EDIT: As for the Warden class, the only peeve I have about it is that I find it hard to tie a concept or feel to it. I'm guessing it's a Warrior of Nature deal, but are we talking about a concept like the big burly bearskin-cloaked man living up on the mountain? Or maybe a tribal warrior focused more on shamanism than berserker strength? What other kinds of concepts do you have for the Warden?