I don't understand why people always claim that on the 5D3 the metering does not follow the AF point achieving focus or pre-selected to achieve focus. Of course the camera meters at this AF point as long as you use it in evaluative mode. It's at the bottom of page 171 of the manual and I can confirm that. How comes that people always claim the opposite? Am I missing something? If you use spot metering or the other three then it goes through the center point only but evaluative follows the AF point achieving focus! Only on AF lenses though! And not in MF mode on an AF lens.
So, I use AI-SS switch over the DOF Preview button if I suspect movement. But if I focus and recompose a bit then AI is obviously not practical. On my MF ZE line neither But using AI with my 135/2 or the 85/1.4 S is just a great experience on moving subjects! It is tricky though to select the right AI mode on a 5D3. I'll open a new topic on that soon.
Nobody claimed that. Nobody said in all metering modes, but spot metering.