Drag and drop would be amazing, but I'd settle for just sorting options. Sorting by genre would incredible... sometimes you just want to see your options for comedy, thriller, etc.
I hate that I can't mark episodes as 'Skipped'. I either have to mark them as watched or it lists that I have a bunch of episodes left to watch (that I don't plan to watch). I don't want to mark them as watched so it doesn't affect my stats or in case I change my mind in the future and decide to watch them.
If it were available offline, it'd be great to be able to view your list of shows, episode list, and mark shows as watched. The only reason to be online would be to sync with the server, leave comments, etc. @thg55: I'm usually online but sometimes don't have data/wifi in the car or when have internet issues... it'd be nice to still have access to the app in those cases.