I'm also struggling with the Art library. Another real problem, I find, is that you can't search your 'My Purchases', or order it in any way that I can see. I recently had a whole set of Devinnight token packs added from the Kickstarter, but I can't find them. There are already too many tokens in My Purchases for me to page through - my internet connection is reasonably fast, but things seem to take a long time to load. There are all sorts of options that would help, and perhaps some would be easy to implement. Add additional sort options for My Purchases:
Purchase date (Descending, Ascending) - the most useful option to add would be sorting by recent purchases first
Token file name (and make this visible) - with a page indicator that can let you jump straight to the 'V's, for example.
Add filter options for My Purchases:
Untagged - since tokens only show up in My Library (and in a search in game) once tagged, being able to filter your purchases for those without tags would be very, very, very useful
Search by tag
Search by token pack name or creator
EDIT: As always, you figure something out just after posting! I've just discovered that you can add tags in the Marketplace itself if you drill through the pack you've bought right down to each individual token. That does at least make it easier to browse the included tokens in a pack and assign the ones you want to your library, but the above suggestions would still be helpful to make the My Purchases page more manageable. Spyke