That's pretty much what I did with Mercy and Torb, to get their alts more easily ready.
Speaking of mapping controllers, can someone help me out with my Genji config?
I need jump on L2, so I have it there.
Dash stayed on L1 where it was before.
I moved the cone shuriken arch to R1.
But now I have the problem of figuring out where to put Reflect. I tried circle, but I feel I need to keep my thumb on the right stick or else there is a delay when I can't let there be. I've tried to put it on the R3, but then I have no melee and I need it. It's currently at the L3, but it's it's awkward. On both thumbsticks, I often accidentally activated by pressing too hard, and after several play sessions, I've still haven't gotten used to L3 being my reflect button. I can remember it if I'm actively thinking about it, but I can't do that in the middle of battle where it needs to be a reflex.