FF GXR module = success for Ricoh
Without an optical viewfinder and a now sub-standard LCD, my opinion is that the GRX is a loosing battle against Fuji's offerings.
The optical viewfinder on Fuji is limited to a few primes. Doesn't work with zoom. Can't do magnification like EVF that is useful for manual focusing. A higher quality EVF is way better than this half-baked OVF.
Plus it's this OVF that made Fuji big -- it's as big as Canon 550D. And not to mention the manufacturing cost increase.