Pat
I can only sympathise with your son's plight re- the time signatures. Clearly BIAB is designed so that odd time signatures can be covererd as 'styles' , cramming each cycle into a bar of 4 beats.
Changing it now to a 'supported as standard' feature may be okay on paper, but how many of the other existing styles would sound good in 7/8 or 11/8 I wonder?. What you might find is that they just don't work.
Jammer has support as standard but their styles dont sound like they were designed for use in anything other than 4/4 or 3/4.
At least we would be able to import odd time signature midi pattens into the style wizard however, and that would be good to have.
Regards
Alan