@Jim
The problem with that would be that experts that decide to do a Gligurr and be an ass could get away with a lot more before anybody notices. With the current experts, I doubt that would happen, but it's always something we should consider. Also I believe silent edits do still have the "edited by" thing, they just don't bump posts.
That being said, I do think that something should be implemented that prevents edits to old posts from bumping them, as I have noticed before some users editing their own questions that are relatively old for trivial reasons, and, beyond that, edits not bumping old posts would allow experts to contribute to the site, in terms of improving post quality, a lot more. Maybe a page that can only be viewed by editors and higher that displays all edited questions could be implemented? I've not no clue how easy that would be for PM to implement, and he's already busy enough, so I doubt that will become a thing, at least in the foreseeable future.
As PX said, the auth team has been discussing stuff relating to site quality, so I wouldn't do too much for now, but if you do see recent posts and feel as though they could be improved, feel free to do so. Don't worry too much about comments, but, on questions and answers, correct grammar, increase clarity, make movesets more uniform, anything like that. Small stuff can go a long way.