Unit Auto Repair
this is not the unit repairing itself (its 1 in the morning and I can't think of a better name). Basicly it is when a unit is damaged and you have an active garage the unit will have a new button, a repair button, and when pressed the unit would automaticly dock with the garage, get repaired, and go back to the position it was at before. This would also work with groups, if you have multiple units selected, and any are damaged, you can hit the repair button, and the damaged units will move to get repaired and than join the rest of the army.
I dont know if somone already submitted this, and if they did Im sorry, I'm tired, and I wanted to post this before I went to bed and forgot about it lol