hi,

together with a "quality" score - one to five stars perhaps.

Maybe.
My idea is that by counting of downloads anybody may see the most popular software issues. For example, I am just interesting which parts of code people have troubles mostly with.
And by list of comments anybody may read what do other people think about that software before start to download it. From other side, by their comments the original poster may improve the software as well.

Regards,
Oleg