HasRallyPoint=

Several buildings can spit out units without having FactoryType=, the most painful of which being the Armory (and possibly the RA2 Hospital?) where you'd have to select and move out each unit individually. There was/is a fix for it by assigning the buildings a FactoryType=, and thus giving them a Rally Point but then they also count as said FactoryType, which is meh (and unusable with UnitCloning).

A much more elegant method would be to have a tag, say HasRallyPoint=, that allows you to set a Rally Point on a building regardless of its FactoryType= or lack thereof. The only uses I can think of would be Tech Hospitals, Armories and UnitCloning, but there may be others. EDIT: And there is, Service Depots too would benefit (iirc).