There are some good point for consideration here. The one that I like best is the idea of prestocked cars. It would be great for cars to have stuff inside of them, but would they always be in the trunk? If not, would it be possible to drive the car a few meters and forget that your shotgun fell through the floor of your truck?
Locksmithing skill. Interesting idea, but plausible? To make a regular key lock you would have to have a lot of technical knowhow and the proper materials, (how is a lock really made?). But I agree that renaming it to locksmithing is good. Maybe even crafting lockpicking kits out of scrap metal and hacksaws.
Searching skill. It would be both mean and nice to have this skill. I mean that it would be great in a late game situation when you are looking for just that tiny ingredient, but early in the game you should be able to grab everything. As for hidden doors, how would that be different from me looking at a house and saying “Here is a square house, but there is this corner with no doors leading to it, it must be a hidden room”. What I am saying is that it would be more user guided to see hidden rooms than avatar guided.