The changes to skills are pretty minor...nothing that stands out as warranting a new character or deletion of one. They're trying a thing with frost staff dk tanks...hrm...we'll see how that goes.

Pvp should see some interesting changes, we'll see how things settle out. The change to AOE caps will almost certainly bring many of these abilities into competitive play in pvp, but there aren't many conversations on the pts forums to get a sense of what the new metas might be.