As user i would like a creator or even partially user ran (like steam) tag system that would affect search. This could also be used as a rating system. Everyday i see new content with sensitive material, i think there is a growing need of some way filter it. This could be a way to achieve it and the search function would benefit of it.
Tag and/or rating system
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Only downside I see is that the avenue for systematic abuse through that system still exists, even if only the developer can see it (sometimes, especially if only the developer can see it)