Is anything more known about step and/or grid sequencing? I have come to enjoy programming drums in a step grid mode on my MPC and would love to do the same on the FA pads.
Regarding MIDI in song mode.... I am not sure if this is known yet, but I would only need it to respond to MIDI clock (start / stop / tempo) in song mode... I can't imagine it wouldn't, but it never hurts to double check.