Let me start by saying that every instrument I own is Yamaha. I was super excited to upgrade my digital piano but I'm somewhat disappointed in Yamaha Synth department.
As long as I remember, since I managed to earn enough money to buy gear, I was never happy with the Organ sounds in Yamaha products. Couldn't Yamaha Synth department put decent Organ sounds and add a proper interface with drawbars to CP88?
I was expecting some improvement and more complex sound synthesis instead of pure AWM which is currently offered in Yamaha synthesizers. This device is very restricted in terms of adding/editing voices so it makes sense to have a better set of features and sounds.
Also, I was hoping to see longer samples with all the 88 keys sampled. P515 seems a better option for me but I would rather use my current digital piano and wait may be some more time to see something with a proper set of features.
It's so disappointing to see Synth department is parsimonious in utilizing the available technology.
Still, a nice instrument but not my kind of gear.