Makes sense about burglary but I think the other skills in the tree are still useful enough to make it a pretty no brainer choice if you're not a mage. Teleport and invisibility rock and this provides them. I'd take it even without the picks. I like your suggestion about crafting them in addition to the no use on door addition. I would think they should be a level One skill though. I can't see someone not trained in tinkering being able to craft them easily.