because in "Grace, Pace and Space", they could probably meet the last two criteria, but probably not the first one. "Grace" and "SUV" don't naturally go together (if one uses those sensual traditional Jag sedans as the benchmarks of this attribute).

But if they made one, it could steal sales from their Range Rover line ... which already uses the Jaguar V-8 engine ...

They should make a proper "shooting brake" (aka station wagon), which could meet all three criteria. Or something taller, which could compete with the Benz R-Class.

Going back to the original topic, the failure of the X-type is a textbook lesson in platform engineering. Status-conscious customers do not want their cars to share genes with those used by the hoi-polloi (i.e. Mondeo, as good as it is) ...