The first suggestion would be a nice addition to single window browsing, I guess (though I don’t use that mode myself). Could be another checkbox under “Show navigator” in Tracker’s preferences. The other two things are also valid ideas, though the last one isn’t something deeply integrated in the system and could be done by a 3rd party and maybe added to the image at some point.
Having multiline filenames in icon view seems like a good idea in general, not just for renaming.
Anyway, at least the first two suggestions are valid enhancements that should be put into Trac. Otherwise it’ll get lost in this thread that only few people and even fewer developers are aware of.