Question/thought about gear: did you consider a battery grip ?
Um, no, not at all because it doesn't result in higher fps like in the good ol' days and I don't have a problem shooting portrait without it if it's not for the whole day. Any reason you think I should get grips for 60d/5d or both? At least on the 60d, the battery lasts practically forever.
About focus and recompose: people often comment that this causes focus shift. I've tested this with a focus chart and the 135mm f/2 at minimum focus distance and I could still focus and recompose center to edge (I think in a real shooting scenario you'd get a reduced keeper rate if you did this, but in a real shooting scenario the thing you focus on usually isn't going to be positioned at the edge of the frame).
I thought about it and it's a large issue when shooting f2.8 1:1 macro with minimal dof, then it's either mf or using the af point where I want the focus placed. But for run & gun shots, my focus points won't be that much off center, and while af'ing af f2.8 I usually shoot at smaller aperture for safety (eyes in focus) and because I don't want the "minimal dof" style in all shots.
But the main issue: At least with my 60d switching the focus point takes a lot of time, so this will only be an a possibility if shooting minimal dof portraits with a fast prime. No doubt the af of the 5d3 would help here, but for me this doesn't justify double the price of the 5d2 just yet.