All I'd really want out of a Mirror's Edge 2 would be to make it very similar to the first game (but maybe a slightly different setting so it doesn't look the same...), but no combat whatsoever, you would be encouraged to just run from and avoid the enemies. A story could be in there, but instead of the "e-surance" style cutscenes, make it all viewed from the first-person perspective like the Half Life games. Oh yeah and of course bring back Solar Fields.