Here’s a neat trick that’s not very well known:
The Icon view of Tracker takes the List view’s first column attribute as file label. So you can switch to List view, move the “Rating” column to the far left, switch back to Icon view and now have the rating under every file. Neato! Works with Mini icon view too.
I could imagine a submenu in Tracker’s Icon view called “Number of label attributes” or something. With it not just the first attribute column is used as label, but e.g. up to 6. One on each line.
Also WRT a thumbnail view in general. I’m not completely sure it’s needed anymore. Back in BeOS, we only had 16px or 32px icons. Now we have up to 128px icons, which should suffice for reasonably large previews. OK, maybe since HiDPI displays, up that to 256px…
Then again, we wouldn’t want to overwrite the actual icon of a file. So, maybe another tickable sub-menu “Use thumbnails” and do use a thumbnail attribute if available.