Yes. The outer focus points on my 6d are not reliable. Especially at wide apertures with narrow DOF. I agree that focus and recompose is the way to go if you are wider open than like f/5.6 or so.

If you are shooting with a super narrow DOF and focus on something particular is critical consider framing the subject loosely, using the center AF point WITHOUT recomposing, and then just cropping in post to de-center your subject.