I really think they should add a page in the community hub area for the games that has a version history, which lists all prior versions of the games and allows devs to update that area with patch notes for each of the previous versions. This would allow retroactive patch notes (for devs who don't keep up) and would also allow people to see if the devs bother to put up notes at all. Would also keep the Valve involvement at a minimum, as they could just have the page auto-update with a new area when a new version is releasedaccepted.
If the devs already maintain a forum/news feed with patch notes, the solution is simple, paste a link. 2 seconds. Heck, I'm even happy when devs post an announcement saying "We patched the game, notes can be found here: LINK". Not having patch notes available for a game is quite frustrating though, especially if you're waiting for a particular bug or issue to be patched.
Does anyone know where we can submit suggestions for steam?