I'd see the introduction of new firmware as an indication that Canon may be planing a new sensor for the 7D2, and needs to hold on for dear life until that can happen. Its also an indication (assuming true. its CR1 so far...) that Canon is still investing in that market position (premium 1.6x prosumer). I hope they blow socks off with 7D2, frankly, but the market window of opportunity (it seems to me) is shrinking -- 9-12 months remaining, at the max. Except for the 1Ds3, 7D is currently as old or older than any other body in Canon's entire DSLR lineup since the begining.
Actually I hope 7D2 is positioned as a pro-level 1.6x body