I had both the i3 and then i30 over a period of six years and they were ahead of their time with style relating to different chord changes up to 16 looped styles. You could even edit these in each style. Totalling six chord variations.

Even Yamaha have improved from their then 2 & 4 bars looped styles.

Band In A Box has the idea of taking random style riffs from a style bank in each category which is possibly the way to go.