At first I had a little trouble understanding what the mechanic was. At first I thought it was about attacking, so I didn't understand why it wasn't atacking when I was right in front of him. It took an accidentally right timed click while sneaking to understand what was going on.
Mine was enhanced with bunch of adult and other mods, so maybe I’m getting vanilla and mod features mixed haha.
Mainly just that you crouch and click on an NPC to steal. And master pickpocket can steal equipped items. But apparently master sneak doesn’t disengage in melee though, so remembered that wrong, been a while since I played. No dodging in Skyrim either, that was somewhat inspired by For Honor.