@ Neutronium; I know, I even said so in the start. I was merely stating "breaking" stuff on bashing is more logical and realistic (even if other threads on this forum starting to make me hate those terms) than magically getting extra loot upon opening a chest, even if the actual implementation of the system mechanically is "lockpick; bonus item".
According to your response, you say luck is mandatory at the moment, as it adds bonus items to drops. Is it however? For lockpick this would be even worse, since there are less locked chests than any other lootboxes luck can work for.
In the end, luck would still be superior in the lootfactor, but it gives lockpicking a nice boost over bashing, and is hardly criticial, just as luck isn't (but it's really nice, so I definitely boost luck ;))

I wouldn't exactly be in favour of Dr. Koin's lootbox suggestion. Identifying is already a step from unused to usable loot, I don't see a reason to add another. Especially seeing how it's mentioned that would make lockpicking useful as another moneydrain if no points are invested in, but the method given states that you get the items inside free anyway, just not the money that's there. That's not really a drain on your money, is it now, like repair/identify? That's just not getting some bonus money. And we all now money is aplenty enough atm without adding more to the cycle.

I do like most of Stabbey's "use lockpick here to avoid some fights" scenarios. Thruth is however, no one will still do that, since unlike Pillars of Eternity, fights are big XP here. And thus you're just cheating yourself out of experience in return for lockpick points. Avoiding traps is more like it...