thx for the nice comments 
Did some investigation into DisplayLayers today, maya doesn’t provide many callbacks, when it comes to that. That means we are in for another session of CommandCallback and string-parsing 
Good to hear
Limitations on scene-size? It will only be a matter of performance. The more objects are synced, the more communication and especially executing commands will have to be done. So in theory there is no limitation of how much stuff you can transfer or sync, it may only take some time for the job to fish.
When will it be finished? Don’t know if it will ever be “finished”… there will probably always turn up new features to be implemented. If the current state is all you need, just grab the code and compile it for yourself 
Until all the features are built in that I currently have planned… probably in two months or so (won’t have much time for programming next month)
It will be free, at least I currently have no plans on monetizing it… maybe if I come up with the-ultimate-feature™ I might think about it, but… I’m more a friend of free-stuff to help people make good games
Currently it uses the existing static meshes from a Level (export to FBX, import in maya) and syncs by the name of the objects. So for laying out a level you would currently at least have to start by placing the required static meshes in UE first.
Moving a whole scene from maya over to UE with one click (or maybe a few more) is planned for the future.
I will keep you posted