So, we've got smart cast on pretty much all skills, but on one its completely pointless and that is repairs.
Why? Because it affects units exclusively right next to you, could smart cast for repairs had a greater area or even auto repair toggle?
That's one thing that I consider a quality of life change and not "uber micro skillz".
Repairing multiple units, while its not "hard" with shift clicking, well, its a chore where you're massing something from scrap and want to get it back to 100% health and smart case doesn't even make gretchins repair stuff they just built at times because apparently its too far, so either greatly increase area of repair smart cast and make repair into a toggle.