Ramp routed straight to the filter ? Very interesting.
Gotta try it soon.
And to my ears the problem also is the fact that xpander has weaker soundung oscillators than a discrete old moog of course, and maybe weaker than some other CEM based synths. I noticed it when listening to a raw waves of the xpander. They are not that ground shaking, But yeah, pad and evolving possibilities beats all other synths.