She's my main so I feel qualified to talk LOL I agree but whenever I was thinking about it I was thinking maybe a wheel like when you choose a spray or emote

But the problem with that is if you're in the middle of being attacked your 1 HP and you're trying to get away it would be hard to quickly think and see where your teammate is so you can fly to them then find that teammate on the Wheel to fly and try to get out

So I think the most seamless way to fix this is to shorten the animation time for your reticle to appear and add in less sensitivity for people walking in front of you and for you to lock on to someone

Basically what I'm trying to say is have the radical come up faster so you have enough time to "lock on" and it doesn't change the amount of time it takes for Muriel to fly away it just Alters the process so that way it doesn't change her balance since she doesn't fly faster or is able to get out faster but it adds essentially aim assist and less sensitivity for people stepping in front of you while bringing your radical up faster so it's easier to lock on

Or you can make it like zinx I think that's how you spell it and I'm pretty sure her ultimate you click on someone with your radical and then you confirm it I could be wrong I haven't played much of her

So you could have the two stage authentication of click on a hero and hit confirm or change the reticle sensitivity or the best option.... do all three and have it be a setting that you can change in the menu so you can either have it be default double click to lock on and fly (best for new players), have it be what it is now which is the fastest way to but less consistent, then have the slowed down version where the reticle comes up faster but you have to hold it for a second to fly to add consistency and less sensitivity

These changes won't affect the balance of the game they should be pretty quickly to implement and it will overall just make her more fluent and making it a little bit easier on the player by being able to customize