This would help when building TCs and for late game when one is spamming lots of production buildings.
Currently one has to come back to now finished buildings to set a rally point. If one forgets, one gets idle villagers or soldiers…
I for one rarely go back to my production buildings. I just use my hotkeys and produce.
I use shift [+hotkey of the production building] to select all the production buildings and train units, without ever leaving the action. I therefore never see idles until I notice I’ve an uncomfortable high number of idle villagers. Military idles often entirely go under my radar, considering there isn’t like in AoE III a button to send all of them to a certain place on the map
(see Add all military units command button, just like in AoE III)…