Lockpicking is almost superfluous in this game, since you can just bash down most locked doors with a sword. The only reason I ever use lockpicking is because it's faster than a physical attack. I wouldn't want it slower.
I also agree with others here that player skill-based lockpicking a la Bethesda isn't needed in this type of game. There are enough other ways to include puzzles that require a bit of manual input, like placing barrels over floor vents.
