We tried to make it clear, perhaps we didn't, that the reservations Bill and I have regarding the Jobo are for small format film, i.e., 35mm and 120, and for pyro developers. I have consistently said, if not in the FDCB then in other discussions, including those appearing on my own forum, darkroomcookbook.com, that the problems of reduced sharpness that we identify are not of great concern for anyone using 4x5 unless you go over 40x50" in enlargement. If this is not clear then I apologize.
However, the problems with aerial oxidation that are likely to appear with pyro unless modifications are made to the formula or processing procedure, apply to all formats.
I am not certain that we are recommending any particular developer, undiluted or otherwise, for use in rotary tanks. The main concern is that the developing agent doesn't exhaust before development is complete.