It would be nice to be able to search for a tab and not have to scroll through 30 variations of every song. Clear out any tabs with less than 3 star rating if there is at least one more suitable tab of the same category. Perhaps also a perfect rating for some of the more popular tabs where any new submissions automatically get rejected?

UG doesn't reject tabs automatically even if there're planty of other version for the song. The system rejects only tabs that are badly formated and look similar to the versions that are already on the site.
BTW the moderators have just accepted 2 of your tabs. And as far as I can see you don't have any rejected tabs.