I agree. The problem is that bringing this arranger concept to a set of players that have never had it before, and then making it unnecessarily complicated tends to ensure that it won't become a go to feature, and may eventually get dropped.
TBH, I am not sure that the reason Roland dropped the feature was, they kept placing the buttons for it FAR away from the keybed, and may have made it 'out of sight, out of mind' for the majority of Roland players. And it never was an FC-7 option...
But I think I disagree with moving the CS touch screen buttons to the Marker page. Having them front and center (ok, front and edges!) on the Main Page makes them more likely to be used, and more likely to be convenient to the player. Anything that moves you off the main page tend to be a more marginal function.
I still think that re-naming the function the 'Third Hand' makes the concept more understandable to the average player. 'Sequencer' simply brings too many associative impressions to mind, and I still find myself having to explain, time after time, that the CS is NOT a 'Chord Track' like older arrangers used to have.
If you have any email addresses for the development team at Korg, forward them to me, please. Perhaps I can articulate a good reason for them to improve this?
_________________________
An arranger is just a tool. What matters is what you build with it..!