Hmmm.... I seem to recall rumors that Wyvern was really DW Bradley. They were put to bed, but she certainly seems to be doing a lot of game preference research lately, doesn't she?
What else would I like in the game... the ability to mix potions, like in MM6-8. I think that would be helpful.
No... I know! A game editor -- the ability to expand on the world with new modules, quests, and so on. That would be fantastic!
Plus, you could finally give ol' Say-Basta his due...