I really think it'd be useful to be able to create hotkey assigned groups for slaves. It'd work something like this:

i. RTS select slaves, hit assign squad group keys - something like alt+1, 2, etc.
ii. Hit the select squad group key - eg. ctrl+1, 2, etc. and all of the slaves in that group are selected.
From here you could RTS a target or change the setting for multiple slaves at once - stay close, attack my target & fight enemies - instead of the current system of opening each slave up one after another.

Voting Link =D

I'm not against those but perhaps they deserve a suggestion of their own