There is nothing more important than Premiere Pro compatibility. Rush can not export or import .XML timeline or sequence.
You are killing the ideology behind the name of the app "Rush". Every editor when is in a hurry or traveling and the time in train or plane or away from Laptop and wants to do some Rush edit, like have 6 hours of footage and wants to start trimming and for a few days when he is back home can do the other stuff on the PC... I suppose you are keeping Rush dumb on purpose cause you do not want it implemented in the profesional workflows, just ******* kids to touch their screens while Rush is open.