The lockpicking skill should be removed and lockpicking should become a skill based minigame with harder locks being harder to pick.

The fact that you need to invest into a skill for lockpicking, and the fact that you need lockpicking 5 for over half of the things you can lockpick are why lockpicking can't be good. Busting down doors and chests doesn't require investing into any skill, lockpicking shouldn't be any different. Make lockpicking gain bonuses to how easy it is from certain attributes like Dexterity and Perception.