I hope I spelled that right. In any event, simple suggestion.

Suggestion: When switching Miens out of combat, adjust the health of the character to the same percentage it was under the other Mien.

Motivation: Re-buffing after death in a Warfront leaves you at about 60% health if you're running the tanking Mien. It takes a while to heal back up to full health, which leaves you out of action for that time. It's not dreadfully long, but enough so to be annoying.