Instead of just one hotkey to select everything, please split this into 1) “select all army on screen” and 2) “select all econ units on screen”
Example of usage: Press hotkey to ‘focus on event’ where my units are under attack, then press ‘select all units on screen’ to retreat from said attack. Buuut oops I also had villagers working on screen too but I didnt want them selected/moved.