For migration purposes, it should go either way. Import controller settings from wall controller to TE as well as export settings from TE to wall controller.
Also, it would be nice to do this on an individual contoller basis to aid in evolution. I have multiple controllers and don't want to muck up the "working" controllers as I experiment with TE on the "new" controller. It's OK if import works on all controllers as long as I can selectively update individual controllers. Once I understand how TE works for this an update all controllers feature would be convenient.
I would really love it if I could program scenes on Scene controllers without having to run around to every dimmer.
It would also be really nice if TE could emit a configuration database (XML file) with everything it knows about the network (static config as well as current state). This would go a long way to helping folks debug things (files could be posted). It also helps documenting the world and we can write various post processing tools to make it pretty.