After recent issues I have had with a particular publisher it would be nice if there was a way to rate a publisher and not just a plugin. I would not want to get a 4-5 star plugin from a 1-2 star rated publisher. It would be nice if there was a reputation rating sort of like what eBay has for sellers. You would still have rating and reviews per plugin but also per publisher. This would help you avoid publishers with bad customer support.
This might help work out a lot of the issues people are having with the store and plugins that have very little reviews. If I see a plugin with one 5-star review and that's it I probably will avoid a purchase from now on after being screwed over a few times by crap devs.
/rant