This is a feature suggestion so it might not even be the proper place to post it, if not, sorry.
Anyhow, moving on. I'd like to see a feature where I'm able to adjust the preferences (like "playable") of multiple units at once.
My idea here would be the following:
Draw a box around the units I want to edit.
Right click on a selected unit (or left click) and the regular menu will come up, where I will be able to change things like usual, BUT these changes apply to all units selected.
Incase of conflicting variable names, simply add a _1, _2 at the end, like now when copying units.