I'm curious how this would actually work. I use the 7D, which also uses the Transmissive LCD in the viewfinder (TVF, to shorten it). I use AI Servo pretty much exclusively with back-button focus for BIF, and even use it for focusing on stationary birds and slower moving wildlife. The focus system is continually adjusting focus for you, maintaining tracking, etc. Even between each frame it is adjusting AF for you. Outside of shooting a dark subject against a dark background (which definitely makes the AF points hard to see), I've never really had any problem actually keeping focus and tracking my subjects with the selected AF point(s).
I am kind of at a loss as to exactly how AI Servo focus confirmation would work. Would it only blink red and beep the first time it gets focus? What about when it gets slightly out of focus for a short moment and re-locks...which can happen fairly frequently with chaotic subjects and subject tracking...would it blink and beep every time it determines it has reacquired focus lock? What about between each frame...does it blink and beep there as well? When using AF point expansion and af shifts to a neighboring point for a moment...do you want/get a red bleep there?
Personally, I'd prefer they find a way to make the AF points more visible at all times WITHOUT them blinking red all the time. A black AF point against a dark subject should maybe turn white...or become a white box with a small dark outline so it stands out...without blinking or turning red, which would be rather distracting and more intrusive to actually tracking your subject than an otherwise static AF point.
