I think, and to be honest - this is just conjecture, Roland must have made a big change to the personnel of their arranger R&D team after the G1000. SO many different things and new ideas all started to appear around the same time, the V-series almost felt and sounded like a different manufacturer's product, and it's OS was totally different to all the G and E-series arrangers that had come before.
It is my opinion that Roland must have cleaned house rather drastically, and many of the key R&D people must have moved on, and left a new team in place with a very different outlook on what an arranger should do. Unfortunately, sometimes the baby gets thrown out with the bath-water, and a new team loses sight of the core features' usefulness, especially if they've never used said feature before.
It is time for ALL Roland arranger users to speak loudly with one voice - You made a HUGE mistake dropping this feature, and should re-introduce it at it's earliest opportunity. You already have the code, it's a simple enough concept, and to be perfectly honest, it's FAR more useful on an arranger than a full-featured sequencer. Anyone in their right minds uses a computer for serious sequencing, but there is no way to do the Chord Sequencer except in the arranger itself.
Show us how much you care about what the actual BUYERS of your product want, and re-introduce the Chord Sequencer. I, and many, many others, will guarantee to buy the first new arranger with this feature..........
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An arranger is just a tool. What matters is what you build with it..!