Unless I'd read this thread I wouldn't have thought there was much call for this facility - but seeing as I did read it!!! I thought I'd see if Tyros(2) could be configured to do anything similar.
FWIW:
If a chord sequence is recorded to Multipads Tyros can be configured via Midi to play the styles according to that chord sequence (if required the MP can be recorded so that it loops.)It seems to work best in Fingered mode with split point set to C1 so that most of the Keyboard length is available for playing along with the sequence.
In principle it involves intercepting the Midi-Out data transmitted by the MP's and routing it back to Midi-in (via cable)and setting up a midi template so the Chord Detect feature can come into play and control the Style, without the panel voices interfering.

How reliably and effectively this could be used in practice would need to be assessed.
Trying to do something "different" with midi is never straightforward
John