Well I guess the real benefit of having a sampler and or sampling capability on the Tyros II would depend on how they implement it.

The user should not have to install anything else. It should be ready to read/make 1GB worth of samples out of the box. The memory for new samples should be in flash rom.

If it can read commercially produced samples then that would make it an endless sound resource. No more buying a keyboard just for one sound.
Of course if it has full sampling and editing that would be a plus especially for those advance users who want and need that feature.

Creating and editing a sample need not be difficult nor counterintuitive. It should and can be easy and logical.

But again maybe I am just spoiled with the Genesys Pro. It is not that difficult to create and edit samples on that keyboard. The only drawback is that there isn’t that much sample memory. Although having said that I have gotten around 70 extra sounds by way of the sampler.