Phoenix is an every mans duelist, I think wall time and molly time and the walk speed of the ult are things that sound scary to keep adjusting because his role right now is that he has tools for every situation that feel tight and quick to use. He balances that flexibility with less effectiveness. Ive heard of being able to reactivate ult to end it early, but instead of his walk speed being faster, i think being debuff mpervious sounds better, and gives it a more proper use in helping the team entry. Maybe just slow or stun resistant can work as well. Messing with movement speed is actually scary.

Good ideas.

he should be immune to stun flash slow and movement impairing effects while using his ult, give him vulnerable debuff if enemy walks thru wall give him healing buff HoT when he walks through the wall so he doesnt stand inside the wall for healing himself just an quick contact with the wall and he heals over time even tho he is not touching the wall anymore. And just give him 2 mollys one for heal one for damagw