I'm mainly just playing with tutorials, and world editor (height-map import etc.).

But the modelling workflow seems to be fine too:
-support bvh motion capture skeletal animations directly! (lot of such a files are freely available, via Fragmotion they can be used in MED too)
-support dae, fbx, ms3d and x for animated characters directly!

as a proof, one minute ago I drag&drop a milkshape model with skeletal animation (converted from Medieval Total War 2, so not a simple one), and works perfectly. (The same I use in 3dgs for testing.) Vertical bones appears wrongly, but works fine (the developer said in the forum in similar cases that it can happen but always must work.)