I used to have a QY700 machine, and those Yamaha guys sure know how to program styles for the modern listener.

They have a simpler pattern based approach and make use of rich XG synth which helps in the richly detailed programming for synths they get.

It would be great if PG could do a deal with Yamaha and actually license the Halion Sonic engine and sound set for BIAB.

As you and others say. the MIDI side of BIAB and other Arrangers shouldnt be neglected. theres still a lot if mileage in that side but
it does require a much richer sound set and synth capability than just GM2.