I mean that there is a very large difference between reviewing a level and a tileset, as the current way of review already implies. When you review a level you talk about game play, design, placement, everything that's relevant to creating a level. But when people review a tileset, the only thing mentioned is usability and rarely lacking functionality. There's very little the creator can actually learn from the review, and it's very often people hold back useful comments that are relevant to the artwork because they don't think they can base a rating on "suggestions" (such as constructive criticism) on how the tileset could be improved.

You can actually see that on my upload and the feature, the first comment there was actually criticism by EvilMike - but I assume he did not post it because he didn't think of it as a "fitting review" when going in detail with that opinion wouldn't just have told the downloader what the tileset felt lacking, but also me and other tileset artists what tiles to draw. I actually get the feeling that some people hesitated to give me a review because they felt they didn't have proper reasons to the review standards to downrate my set.