Is AFMA even necessary with the new focusing system? I'm just wondering. I got the impression that since the sensor itself is confirming the focus, adjustments might be less important.
No, AFMA isn't necessary for the Dual Pixel CMOS AF, nor is it necessary for the Hybrid CMOS AF or good ol' Live View contrast detect AF. But remember that those AF modes which use the CMOS image sensor only operate with the mirror up - not through an optical viewfinder. The 70D has the 19-pt AF sensor (from the 7D) that's used when looking through the VF, and that requires AFMA just the same as any other standard phase detect AF system.
That standard phase detect AF is still the go-to with fast moving subjects, and holding a heavy camera + lens out in front of you for Live View composition isn't always easy - the VF is there for a reason.
Thanks. That's about what I expected.