2) Sure, but again, just because they can add a feature doesn't mean they should.
3) Interesting, I didn't know that. Maybe they are planning to add the feature after all.
Another option of course is to use the Google Drive desktop program, and edit your plain text files locally, which will be synced to your Drive.
As mentioned elsewhere in this thread, the Google Drive desktop syncers leave quite a bit to be desired. I've used both the Mac and the Windows version. The Windows version crashes regularly, and the Mac version racks up sizable memory leaks after a few days of use. They both use more disk and CPU resources than it seems like they should need, too. At least they aren't as bad as the Google Music desktop client, though.
Similarly, I'd like the ability to view (and download/upload) my Google Music files in a Drive style. You know, while I'm dreaming.