Yes, that would work, as I've just noticed you have child R with parents 3-4. I had both Child L and Child R with parents 1-2, but Child L panned L and Child R panned R. (And the HyBrit routing as you had figured in the project you sent).
Yes, your configuration and mine seem to give the same result except that with yours the child track pans act as vol controls (child L panned L for max, child R panned R for max)..whereas with my configuration they still act as pans. Sounding great BTW...I'm liking going into each NadIR and making the ambient slots volumes about 2 oclock and the cap slots about 10 oclock.