That´s right. @legend described the problem some years ago . I can't tell you exactly why ZF is sticking with the "Pizza Base". I can only assume that there are technical reasons; the guys at ZF aren't stupid or blind ;-)But XF had the same Miyota based movement and hand base was noticeably thinner, I mean it still was thicker than gen but looked so much better than ZFs massive Italian pie bonanza.
Maybe @legend has a answer?