I depart from the usual response in my stating I actually like the FTZ. For close-up and macro work, having the support mounting on the FTZ helps gain more stability of the rig.
I have "solved" the problem of brackets by having dedicated L-brackets (Markins) on the FTZ itself. These FTZ units are permanently attached to my most used 'macro' lenses, like the Laowa 25mm f/2.8 (2.5-5X).
Since I'm still -- less patiently, now -- waiting for my long pre-ordered Z9, cannot say whether I would want to add an FTZ II later. Probably?