Everything makes sense 
some really interesting & useful ideas here!
The only one I’m unsure on is Leap of Faith, unsure how she’d be causing knockback with just her body; how about a pole vault type move that damages/knocks back in front of you then propels you up & over? Keeps the baton in use aswell then
I’d also say her Ultimate doesn’t need the movement speed reduction to balance, it could even get a speed boost as the barriers are attached to her model; she’d have to move to get into place to shield her team.
I made a concept for D.Mon with a very similar ult actually 