It is no secret that a team of British players, known as the Yamaha development team, are in Japan working on a new product.
The secret of Yamaha's success is that they have a team of top professional players to work with the firm's technical experts to produce something that is user friendly to the home keyboard enthusiast. The positioning of the buttons (the tabs) is just one of the many detailed things that are considered.
Sound combinations and registrations are of prime importance to professional players - and if it suits the team's critical ears then it is sure to suit the home player.
This is where Yamaha score over their competitors because the software and hardware designers listen to what professional players have to say. If other firms listened to players with over 25 years of experience they may (just may) catch up with what Yamaha have to offer.
The only thing Yamaha is listening to is their own wallet, why havent they created a 76 key TOTL aranger ever since the 9000 pro?
If they want something truely astonishing you should be able to operate it intuitively while selecting programs and sounds.... but beneath the hood there should be an immeasurable depth tweaking the instrument... totally unnecessary to use by most players that just want to enjoy the standard choices, but very neccessary for pros that want to create their own sounds...
And inside what looks like the standard arranger engine, there should be a hidden Karma .. and inside the Seuqnecer there should be a live MAtrix... not visible when unneeded but selectable when you wanted it..
and several different sound engines to cooperate deep inside the instrument...
But most of all, if it was an arranger, the means to controll the expressiveness of the sound with sliders/ pedals/ X-y pads/ knobs / d-beams and whatever neccesary... but then this would be conflicting with the easy to opperate instrument, but so neccesary to allow for the expressiveness that future generations of keyboard artists need.