That said, do not make the mistake of believing that you can take a full length resize die and adjust it in the press for a certain headspace {shoulder length, shoulder bump, whatever we are calling it this week}, leave it that way and have it work for all cases.
You have a good point on the full-length sizing requiring a "per case" approach. I've used the Redding competition shell-holder set to try and overcome this, but I am not yet completely sold/convinced. I've seen a good video on this topic and how to use the shellholders (alas, cannot find it again), but I cannot seem to get the same results. It required that you sort your brass according to relative headspace and use the same size shell holder on each group so that the results equalize. I typically only Neck size myself, so for me the T7 is an absolute winner though.