It looks more like a witch hunt to me. All these negative things about the PA3x. First the videos where too bad now the demos are too good. I have take a look in the manual of Korg and there are lots of new sounds. Yes there are also legacy sounds in the PA3X to keep it compatible with the previous models. Say they had only put new sounds in it then people started to nag about that it isn't compatible with their previous PA.

Nothing about the new PA3X seems to be right to some people.
I decided to buy my PA500 after hearing the demos on korgpa.com and I can assure you that the PA500 really sound as good as the demos and I am sure that the PA3x also sound as good if not better as the demo's. The question is only can you play that good.