I know it would be a huge ask.
I noticed it is a bit of a hindrance when you cannot see the troops of a non slotted squad. On the squad window you see all the squads but not the soldiers. On the soldiers tab you only see active squads. The ability to use both would be really useful for swapping out gear across multiple BR’s. I have years of event goodies and I bet 30% of them are lost in some kind of void of little used squads. Again, I know that is a very complex can of worms to ask to be able to edit both at the same time but it would be REALLY AWESOME!