My only problem with your suggestions is that they shift DNC a little too far into the mage realm. We already have something along the lines of Dia, and the Stomp 'nukes' move DNC too close to BLU's functions and capabilities.

DNC is already a powerful job in the right situations, and I don't think adding more mage-oriented abilities is the way to go. I'd personally love to see SE adjust our healing abilities like separating our universal waltz timer into several waltz timers and reducing the recast on Healing Waltz.