Call the zone the way it should be called
No "whole zone" for me. Anything at or near the letters should be a ball. Really above the naval, should be a ball. Low pitches for strikes are fine, as my DD likes low pitches.
So which is it? Do you want the zone called by the book, or do you want one that your DD likes? Maybe we should have all the umpires watch your daughter play and rewrite the zone so that it suites her.
As for above the navel, those are still strikes (by the book) as long as they are below the armpits.