Fact of the matter is, were Yamaha to upgrade their PSR series with the action from their less expensive WS brethren, absolutely no-one would complain...
Sadly, as has been demonstrated time after time, for some unknown reason, Yamaha users will defend to the last every questionable decision Yamaha take, until the day that Yamaha rectify it, then they will spend the remaining time trying to pretend that they had never said that what they used to have was perfect (and by definition, what they now have no longer is!).
Add to this that the main 'defenders' of this appalling action are players that freely admit they don't play conventionally, if well at all. But, I suppose if you want to take an opinion seriously about an action, what harm is there listening to those who claim poor playing skills?! LOL But agreeing with them?
Take them seriously, who knows..? Yamaha might actually think that the vast majority of arranger players really DO prefer such an excremental action. I guess it's a good thing that they don't take such opinions seriously when making workstations... or their TOTL arrangers!
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An arranger is just a tool. What matters is what you build with it..!