Request: Replace the APC Load/Unload with the Load/Unload of a Command Center or Planetary Fortress.
If you accidentally click a unit into the APC while its building an SCV or something, the only way to unload the unit is to either wait for the unit to finish building and click unload-all on a patch of ground (or click unload-all on the APC itself which most people don't actually know is a thing you can do)
By changing the abilities to that of a CC or PF, the only units that can be loaded into the APC are SCVs and simply pressing the unload ability hotkey will automatically unload the SCVs towards the rally point
This was also a problem I had in Hammer of Dawn but I never voiced it
Something that would be nice in Red Snow is to be able to sacrifice time for energy. I spent a lot of time waiting around for my energy to get back up, yet finished the mission with >30 minutes left. A slightly inefficent time->energy ability would increase the speed of people completing the mission, and get people a little closer to the limit.
Of course it can only be used while out of combat, all enemies heal to full, etc etc.