Hi,
in this regard, did you notice that Yamaha seems to consider that measures to 6/8, 9/8, 7/4 etc .... do not exist in music? However, we can change the time signature of a style with MixMaster, but, frankly, at Yamaha, there must not be many musicians in the designers of these instruments!
Regards
Seagull29
PS/ with the old G70 Roland, we could integrate different time signature in variation !