Some thoughts: * Allow only positive reviews * Remove the star rating and replace it with a simple binary "like" icon * Keep the active install number but do not account it too much in search results * Remove tags and replace it with categories * Allow reputation based reviews * Remove the plugins not getting updated * Display a simple search box in wp-admin plugin page; not promoted plugins * Display a meta completeness rating based on number of screenshots provided, documentation etc. * Require users to donate to plugin author before submitting support requests