For a Swinger, Hinge Action should be viewed as Zone 3.
For Hitting, Hinge Action should be viewed as Zone 2.
The term Ball Control is one of the four interchangeable terms use to characterize Zone 3.
Further, Chapter 9-0 from the 4th edition on (including the 7th) specifically states that Hinge Action and its resulting Clubface Motion -- Close Only; Layback Only; or, Simultaneous Closing and Layback -- IS Ball Control.
Finally, just in case we missed it, Homer Kelley also labeled Hinge Action in the large, bold, capitalized and italicized subtitle of the Hinge Action Variations (10-10-A/E) -- again, from the 4th edition to the 7th -- as BALL CONTROL.
Thus, for almost forty years and through six meticulously-edited editions, Zone 3/Ball Control was Hinge Action's happy domicile.
The posthumous placement of the Hinge Action component into Zone 2 (by the owner and editor of the 7th edition) introduces a serious inconsistency into a great work. And a 'dual placement' suggestion serves only to muddy the waters further.