I understand. Well, the first thing is the "WISIWYG" scene editor. I have never seen something easier to use in softwares like Poser. It is easy and fast.
Second thing : the walking simulator.
Imagine now you could export the animations you have made directly to gmf. You would not have to export your animated models and then use another software to create new animations. I think that is waste of time and some poeple may not be skilled enough at modeling with Maya or 3D studio. Poser can export to RIB, quickdraw 3DMF, 3ds, DXF, BVH... so you can export directly animations. So Maybe the FBX format, or BVH could be usefull too ?
You should have a look at bvhacker. I think it a good software.
http://davedub.co.uk/bvhacker/