I think your rework is creative but would not work in the game.
First off : the healing with the aiming thing would be buggy af and also it would be too strong in my opinion, 70hps non stop (cause aiming is not that hard) that’s too much.
Your E ability that’s also way too strong, first because that mean you make many people useless (Ana, Rein, Brig etc…) but also because if you put that on a Nano Blade you deny any chance of countering him (in highers ranks that does happen and that would make him too strong) but you can extend that to basically all Flankers (Doom who’s already quite annoying you can’t even damage him with your poor support).
The ulti :
Wayyyyy too strong, you’re basically making your team unkillable because 20m is a lot, 10s is really long, and even though you can destroy the orb, that means focusing on something else and letting the ennemy team do as they please.
Basically that would make her way too strong.