There's nothing wrong with it.
The design of the Korg allows for some things to be possible that are not on any other keyboard. There is, however a steeper learning curve and some real time features that require some finesse to master. Many prefer the ease of operation on the Yamaha, but the overall quality of the Korg is as good as it gets.
I'd still have the Korg if a few tiny modifications were made. There's no guarantee that I won't get another one after they upgrade it a few times. I did that with the PA80. Version 3.0 was major upgrade, and made me want one all over again. I suspect the same thing may happen with the PA1x.

The psr3k is a versitile, simple board.
The PA1x is a powerful, deep professional instrument that was not intended for the feignt(sp?) of heart.

In the end ..... only YOU can tell which will suit you best, but you knew that already !