To the people having difficulty with the Multi-controller. How long have you had your camera?
I have mine about 10 days, and I feel that it is starting to improve slowly.
The other thing I wanted to point out is that:
With the 1DMKIV, the viewfinder and AF point turn off together after about 7-8 seconds:
1) all you had to do, to wake up the AF points was to press the center of the multi-controller, then select your AF position with the multi-controller while your thumb is already on that button (Mutli-Controller Button) "thumb"
2) then shoot (Shutter Button) "index finger"
With the 1DX, after the viewfinder lights turn off, and the AF point stays on but is inactive.
1) you have to first press the shutter button to wake up the viewfinder and AF points (Shutter Button) "thumb"
2) then choose the AF point (Multi-Controller Button) "index finger"
3) then shoot (Shutter Button) "thumb"
I use AF-On back button to focus, so I start my shooting sequence in this order; AF point selection (thumb), focusing (thumb), shutter button (index finger).
I don't start with half-press shutter button (index finger) to activate VF and AF point activation, then select AF point with mutlti-controller (thumb), focusing (thumb), then back to shutter button for firing (index finger).
I'm finding this change quite annoying and I'm not sure why Canon changed this as an extra button press for the 1D series?
It's really messing me up. I continuously change the AF point position as I'm following the action and tracking a subject to pick the best composition. Sometimes there may be a pause in the action for 10 seconds and now I have to press the shutter button to activate the VF and AF point display, prior to selecting my new AF point position for composition and then it sometimes sticks, compared to the MKIV.
Am I missing a setting somewhere?
Also to others having difficulty with the Multi-controller. If it gets a little stuck and 8 seconds goes by, or you haven't touched a setting for 8 seconds, you first must hit the shutter button to wake up the VF and AF points and some of the "initial" non-responsiveness may be due to the inactive AF point as the display is asleep.
EDITED: You may also press the AF-On Button to wake up the VF and AF point on the 7D, MKIV and 1DX. So, only the MKIV can additionally wake up the VF and AF point with the Multi-controller. Perhaps this feature can be added to the 7D and 1DX with a firmware update.