My wish list:
Some customization of pets--especially MM pets, but others would be great too
A copyediting sweep of all game text, and ideally a continuation of same going forward
Recipe storage
Inter-alt storage for individual players (I've emailed myself more recipes and salvage than I care to think about.)
If not that, the ability to send more than one item per email
A sweep of costumes, and then possibly of environments, to bring everything up to the detail level the later costume additions already have
But really, just keep doing what you've been doing and I'll be happy enough. It's good to be home.