SceneComposer file format

Do you think that it would be a good idea to introduce a new file format (.j3s ?) for the SceneComposer. From what I understood from the core developers j3o is only meant to be an intermediate format. It can change with new versions of the engine. I have/had some problems with j3o (now/past) and the SceneComposer.

I mean issues like in this thread:
Jmonkey 3.1 scene editor static rigid body control error?

Well we are making a lot of effort keeping backward compatibility with old j3o and except this issue you can load a j3o made with 3.0 alpha in 3.1 alpha 4.