After having done a lot of thinking, I believe that one problem I have (not only with Castriota, but also with numerous other recent designs) is the portion of concave surfaces. To me, this looks as if such car was somehow ill, like suffering from tuberculosis. Just not smooth enough for me, not “liquid” enough.
There is one exception though. This is the Birdcage 75th, a “Castriota-influenced design” I like. I have however no idea how influential Castrio really was on that design.

It could also have to do with his US background. Theoretically, he would be a perfect mixture of Italian and US, for an international company like Saab. In practice, I believe, the American often prevails. E.g., the bonets on lots of his designs, including the Phoenix, have humps reminding of muscle car modifications that might have been neccessary in a past long gone (to accomodate the bigger double carburators), but now only look retro, and not at all Saabish).