it will definately be cool to have a wmo editor for more indoor stuff, I would personally pay for a wmo export from 3dmax because I have some amazing ideas and import is already done in a maxscript file. and thandol span could be fixed (I already have redridge bridge fixed lol @ myself)
I take it the dungeon has to be server-scripted to support instancing but is it possible to have it so the server will send players through different instance portals to different places within a dungeon like in uldaman, gnomeregan or scarlet monastery (sm is more like seperate dungeons I know). The reason I ask, how cool would it be to fly into a zone that the server identifies as a transport to a dungeon so you fly over say the dragon raid in wetlands and it takes you to grim-batol instance(WIP) at an aviary, if you enter through the gates it takes you to like grim batol entrance 1, this is the kind of functionality I would love to see on a PS
Also for any ney sayers look at Shadow Fang Keep, you can fall right back into the game world from that instance and think of how cool it would be to have phasing of an instance for re-runs (to make it more exciting)