I don't know much about how apk and apps in android work.
Title says it all. In my specific case, I installed icon packs from a playstore app to be used along with Nova Launcher. Now I want to get rid of the app that provided the icons pack (it is occupying space). I disabled it with
pm disble .. command. And the icons aren't gone. So, I guess, I'd be fine if I delted the app as well. but I am not sure.
So, does uninstalling an app does more messing with the system than uninstalling it does?