I would not call it oversized. Oversized compared to what? I handled one today at my local shop just for fun, it is a big camera, but then it is supposed to compete with other pro cameras out there.
To me it looks like a Leica T on steroids, same sort of approach, and with the EVF included. It is also very angular, for lack of better word. The grip sort of abuts the thin body of the camera at a sharp 90 degree angle. I much prefer the more ergonomic type of grips from other cameras.
The 24-90 zoom lens is indeed huge, and for no apparent reason.
The camera was 7100 EUR, and the lens 4200 EUR, so I think they will sell slowly:)