Yeah, that riff feature pretty much blows. With SO little extra (put in your own chords in advance, or even better, record them live.... see where this is going?!), it might be a fantastic feature. But a factory pre-programmed set of changes...? P-LEASE....

What are we...? Kids?

Roland Chord Sequencer.... the logical end of this Ketron failed attempt at giving the player an opportunity to jam with two hands. Why couldn't they have just copied this entire feature, note-for-note? After all, Roland aren't using it themselves any longer...
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An arranger is just a tool. What matters is what you build with it..!