I'm going to suggest an off the wall desire... a faster generational turnaround on the high-end cameras. I need the servo capabilities of the higher-end bodies, and I'd love the new ISO capabilities of the higher-end bodies, but I cannot afford these bodies, so I have a 1Ds2. If Canon released a new 1D and 5D body each year like they did with the Rebels, it wouldn't be long before the fancy new high-end features would trickle down to an affordable price in the used market.

As that will never happen, I'll vote for vastly improved ISO and noise handling in a 7D2, as that's definitely due for an upgrade. ie: crop body, high-ISO with low noise (Maintaining 1/2000s shutter, and minimal noise, at indoor and/or dusk light levels), with Servo that can keep up with a champion Border Collie or Aussie.