The idea of adjusting in several places sound very interesting. But with the software not controlling the lens while adjusting, not even being in the camera, how do one know how much need to be adjusted without making 200 tries?? What means -1 or +3 How much distance is that? How you know what number to put in there?
That is my concern. It seems like a lot of trial and error, and shooting charts many, many times. Fine if it is the only lens in your kit, but seems like a pretty huge investment of time. And what if, like many of us, you shoot multiple bodies? I like the concept of the finite focus control; I'm less crazy about the time investment. Doing AFMA on a few bodies is already a fair investment of time (I do it manually).
One plus, however, is that unlike the slow, multi-step task of making each change in the body, the software at least allows for quick adjustments. It would be great if the hub came with a FoCal type software that could automate part of the process.
Having just used Focal for the first time the other day I agree with that. I would love to have four adjustment points on my Canon zoom lenses. At least Sigma users now have that chance! All you need is the data from Focal and you're set!