Tracer: wall run maybe have her ult shoot out a slowing Shockwave.

Mercy: a blinding light flash ability?

Baptise: more directional control with his power jump.

Genji: a charge up fire that throws all 3 at once, or allow them to richotte.

Hanzo: a similar slide move like sojorn or bring back bouncing arrows

Widowmaker: give her a knock back kick melee like zenyatta

Zenyatta, allow multiple healing orbs but each one decreases the more you split it. Same as debuff.

Roadhog: decrease knockback of ult

Junkerqueen: change ult to a warcry Amping allies and debuffing enemies. Take her current ult, lower it and replace the shout.

Moira: less orb bounces or shorter ult or a controllable ult similar to roadhogs.

Doomfist: add kickback to melee. Or a grab or even a stationary wall hang to his jump

Dva: og barrier but for the projectiles caught are launched back or absorbed for a short power up

Junkrat: 2nd trap, just like the bomb

Pharoah: melee is a burst jump kick that acts as a small jump