This is probably one of the most frustrating things about Plesk. Let's say you have 5 databases. In the current system, you have to create 5 users, one for each database. Many times, you want to use the same user. So my proposal is to allow users to either create a new user, or update an existing user to grant them access on any databases that you own. This is especially important now with all these frameworks (like Ruby on Rails and cakePHP) where a typical application will have at least 3 databases (development, test, production). Just my .o2 cents.