To add up on that request, but not just related to pickpocketing (even though it is one of the very fine example)
Would it be complicated to create a mod that enhances disguise self as a whole ? For instance, if I choose to raid the grove while being disguised, no one should know it was me (except of course if a party member isnt disguised). If I start an encounter while being disguised, leave, and then return as myself, no one should be hostile towards my character or group (again, provided everyone was disguised)
It seems like a lot of work but I see so much potential in it !
I also read someone else's idea on reddit and I liked it a lot, the ability to disguise into other people you've seen (key people maybe?)