In fairness to the designer, he's probably not the one who decided the K-01 needed to be compatible with K-mount lenses right out of the box (because K-mount compatibility has been such a boon to them in the digital era). There's no mirror in there, and yet they decided it needed to be think enough to accommodate a mirror! So the guy was starting with something that was unnecessarily blocky to begin with.
That said, it's not he started making good decisions at that point. It just looks like any old camera that's been lego-ized a bit. Why bother? Petax is perfectly capable of producing solid conventional camera designs in house. If they're going to bring in some outside designer, they should do so with the idea of producing something truly novel and/or outside the current status quo of the camera industry. I don't see anything like that here.