I basically agree with everything except the mythic path balance. I don't personally think they need to be balanced. It's ok if one or the other is more powerful as long as they're all interesting and complete experiences.
Wrath is a single player game, and the main design intent for mythic paths is that each of them must have a distinctive flavour, offer a unique story experience and be fun to play.
While we do try to keep a relatively similar level of power between them (and note, that this process isn't over yet, we want to review some of them over time), there's simply no intention to reach a perfect balance in a sense modern MMOs put into it (equal dps/hps, equal control capabilities etc.).