It’s been mentioned before, but lockpicking (for doors, chests, cupboards, etc.) would allow for a whole style of game play that is currently not available. Thieves, assassins, etc., would have more options for plying their craft than just full-blown raiding that requires blowing up doors and structures during raids times.
Locks could go up in quality with the tier of the door, chest, or cabinet – or be independently crafted variables.
Also, “breaking in” a door should be an option short of using orbs / explosives as well. If the door is Tier 1 it might require a certain strength, or a certain amount of damage with an appropriate weapon or tool (like an axe). If it’s Tier 2 or 3 it should be a lot harder, perhaps impossible without lockpicks.
Perhaps lockpicking would require a trainer, and specialized tools that you can’t usually access early on. But mid to late game it could be a nice option short of total obliteration of people’s doors and walls with the “nuke” option.