Better searching or category break downs.
The categories just kind of, well, sucked in the last version.
Better linking to be able to search by creator. If I recall, in the last version a link to the creator was on the page for the lot/bat, but it was targeted to itself. Great for a page reload I suppose.
A Fantastical category for lots that are, well, fantastical. Some super lots are just out there, my opinion anyway.
A category for CAM, so the models used in in those lots are quickly findable.
The last version was pretty good, other than the things mentioned above.
I think the versioning as you mentioned will also help with dependency linking, as some of the files I am using link to dead pages. Now to have all the creators fix their files for the new links that are going to be needed for the Cleanitol....