touchscaper, from Rob Jackson, was updated with support for "interesting" time signatures by allowing for variable lengths for each chord in the arrangement. There's a new demo video to show off how that sounds.
What's new in touchscaper v1.2.4:• Added support for variable length bars in arrangements
• Added separate drums boost option in sequencer view
• Timing improvements and optimisations
All the best for the festive season! -Rob