Motion does work like this, where you don’t import, but simply browse the Finder within your project. So perhaps Final Cut may eventually see a similar mode?
Or maybe not. It works well for Motion projects where you’re using a couple of single files, like photos or logos, but it might not work so well when you’re trying to manage hours and hours of video files, all with long, computer-generated file names. In that case perhaps it’s best that Final Cut work like iTunes, where the name you give a piece of media within the program can be differant than the name the computer gives the file to keep track of it.
I understand that you’re really only asking for a hybrid between these two, not an “all of one or the other” kind of thing, I’m just pointing out that so far Apple’s programs seem to have selected one method or the other…never a mix. But by all means, suggest your idea. Just because they’ve never done it exactly that way in the past doesn’t mean they never will.
https://www.apple.com/feedback/