Same rebuttal to Kabinopus. You don't compare a PSR S950 against an even cheaper PSR (as bad as it is, it can always, in Yamaha's hands, get worse!), or against a piano.
You compare it to it's price point competition. That is the PA900 and the BK-9. Heck you can even compare it against Korg or Roland arrangers at half the price. They ALL have FAR superior synth actions.
But this says a lot about what Yamaha feel mid-price arranger buyers are willing to tolerate. Yes, they put really good speakers in them, even quite a nice display (even if it isn't touch screen) but they put the worst actions in them possible, and somehow, despite it NOT being good enough for everybody else, Yamaha users meekly accept it.
What's up with that?!
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An arranger is just a tool. What matters is what you build with it..!