I got an answer from the Camelot development team today
I asked about for possible support for arranger like Genos and pa4x

They are looking into it..
But so far they found arrangers are much harder to implement then standard synths and stage piano’s
They are still trying to find out if its possible at all to add access to the many features of top arrangers..


Offcourse you can allways set them up as midi ports..
But i guess keystage is much more suited to do this..