I think when you’re talking about Fun, people are more concerned with being able to shoot stuff, than being a hard to kill.
Honestly, it’s a pretty detailed concept of you’re interested:
20% faster projectile speed on Orisa and Sigma mean a lot more firepower connecting with it’s targets at medium range.
Also buffing Orisa and Sigma barriers up to Reinhardt tier, such that you aren’t throwing for picking them outside of a DoubleBarrier comp.
Straight up buffs to Orisa and Sigma at medium range.