Maybe you know already, but sample pitch cannot be modulated by the FM oscillators on the Rz. That would be a good feature request, as a matter of fact.
This being said, I never found myself short on modulations - although it’s true the sample layer could use some more, maybe.
This thing is really deep, but you can still know your way around the rabbit hole, so to speak - even if it can take some time at first to get fully comfortable with.
I’m currently testing a setup including the Razz and the M8. While the latter is crazy deep and flexible, its sample quality doesn’t match the Razz - to my ears at least.