Last-minute wishes for the next map format

[Pi_Halo]

What about negative height mapmodels? You know, mapmodels that are technically starting underground? Felix-the-ghost made a mapping client with such if I do recall correctly. Also, what about better coop settings. A lot of stuff can't be done quickly in coop, like using the slopes and arches command. To do heightfields in coop you have to literally do them, no quick way.