There definitely needs to be an easier way to find pages in need of help; just trolling through the database is, as you say, inefficient, and if you happen to find something massive that you don't have the time to fix your only recourse is to start a forum thread, which may or may not lead to anything actually getting done. There was a brief discussion back when the wiki task system went away about what should replace it, but as of this moment there is nothing.
To be honest I was really taken aback by the inclusion of "Single-Player" and "Multiplayer" feature tabs during the site relaunch. Why you would add additional fields to releases when the existing ones weren't getting filled out consistently is beyond me. It seems like one of Jeff's "wouldn't it be nice" features that utterly fails to take into account the actual labor that would be required to make such a feature useful. Whatever the case, the way releases are handled on this site needs to be simplified or at some point people will just decide to not deal with them at all.
As far as getting additional style guidelines goes, I have a hard time not being cynical about the prospect. I remember a user posting a while back that, statistically, if a wiki does not instate firm guidelines within its first few years of existence, it probably never will. I don't mean to be a pessimist, but I'm starting to come around to this way of thinking. Many people have tried to get clarification from the staff, but not much has been offered.