City of Heroes rescues some of the "good but not minmaxxed" content by
* Empaneled judges, where the CoH staff make "Developer's Picks"
* a variety of filters, including the ability to look for a particular author's other works, ability to look for works with low numbers of votes, particular villains, keywords, etc.

I don't recall whether they have a "judge value" factor, where the amount a given person influences the score of a work depends on how their ratings compare to those of others. (That is, down-weighting outliers.)

And I'm pretty sure that they do NOT have a means where the community can judge other judges (ala Slashdot metamoderating).

I'm pretty sure, though, that one of the problems is "number of submissions" vs "real estate required to display them". If only 1 percent of the wow players were to create something like CoH's missions, that'd be several hundred thousand missions. The only filters I can imagine that would be up to handling that would be variants on either "trust known judges", or "trust people you know personally".