xforms are reset and exporting with Y as up loads the level right but:
a.) all models are loaded with a 270 degree z value in WED
b.) all exported models are turned 90 degrees in MED (see the last picture of my post)

this way it looks right in WED but I am looking for a method to have 0/0/0 values in the object properties in WED as well as MED mdls with z as the up axis (like in the second screenshot in this post).

I would prefer an option in the WED fbx importer where I can pick the up axis before clicking ok.