I'd like to see a command that can save the cut/paste buffer directly to a file and to retrieve it from such a file directly into the cut/save buffer to be used on the map you're working on. These files should be saved in a 'library' folder.
This would allow for easier re-use of cool geometry between maps.
Perhaps even replace or reduce the use of static mapmodels.
This would also get rid of the need to have a hidden area for storing such things on WIP maps and allow such geometry objects to be used on any map that is being worked on, easily and from the GUI; the GUI could return a list of saved geometry objects from the cut/paste buffer much the same as it already does with full maps. It could be as easy as using the GUI to bring in mapmodels.
nothing would be as tedious as making geometry like this:
http://www.youtube.com/watch?v=lYMT1GFoYLE
http://www.youtube.com/watch?v=rPhBEYEGxjw
http://www.youtube.com/user/cmCoopers#p/u/4/U4okl7iTtRk
over and over again, or leaving you current map to load a different map just to fill the paste buffer with what you want.