The suggestion of a clear physics mode similar to what NL has, has come up a few times. I'm wondering what people think - is it necessary? L3D doesn't have the same proliferation of different styles, graphics, etc that NeoLemmix has to deal with, and realistically, it probably never will. On the other hand, there are things that are inconsistent especially in the official levels - are static objects solid, are they climbable, what's steel and what isn't, exactly how many blocks/slabs tall is a fall - so perhaps it's still a good idea to have this.
If it does happen, it probably won't be as thorough as NL's, but at least a basic form of CPM should be viable.