It would be nice to be able to sort items missing from your collection similar to how you are able to sort your vault.

Adding the show missing feature was pretty nice for when you are down to the last couple items in a collection, but its less helpful when you are trying to add a bunch of stuff at one time to a new collection.

Ohgodplease. Giving collections the same filter options as wishlists have would be really nice.

[edit] I think Subetalodge's checklists are broken right now, so trying to work on collections, especially ones starting from scratch, is really unfun. I don't think there's any desirable game play we'd be losing by adding sorting to the missing items lists. Given other tweaks and redesigns that happened in order to streamline, speed up, and add convenience for players, I think adding sorting to show missing would be in line with current site changes. I also think it would be welcomed by player and encourage collection game play.

This would be really nice if you wanted to burn masses of sP on getting a majority of the buyables in your collection sorted. Support!

[edit]I know the items can be added to your wishlist and sorted there for the time being, but that's more pageloads and more stress for the site than just having a few sorting options right on the collection pages.