While we are talking about metadata and how to improve the UX…
I think installers should offer a practical way for the user to override package metadata (mainly in order to influence the dependency resolver). My impression is that however hard we try, there will always be some metadata that is either incorrect or plays against what the user wants. Of course, being able to fix the metadata in the repositories is probably a good idea, but first I doubt it will always be possible, and second I know there are cases where the user wants to override the package metadata anyway.