Agreed. Mic placement should consider sound quality first and foremost.
Sony would tell you it's the FS5, and in practice they do cut pretty well together, being the same sensor and using the same color science. The FS5 has less flexibility in terms of color balance, and the readout is noisier, so find the setting that works on that camera, and then set the FS7 accordingly. In cases where you're using different camera models, you should always aim for the "least common denominator."
I hope Fillex at least puts a warning in their product packaging that it's actually against the law in the U.S. to fly drones after civil twilight without a special waiver from the FAA.
Deakins didn't shoot "Raising Arizona," "Burn After Reading," "Inside Llewyn Davis," or any of the Coen Brother's films prior to "Barton Fink" in 1991.