No i have not tried it yet but theres no harm in trying. If it fails just reflash vzw firmware. I am running at&t firmware on the Verizon note 7 so it doednt apply to Me, as that gentleman achieved root with at&t firmware already using this method. I dont see any difference between using a AT&T note 7 vs Verizon note 7 at this point when flashing the Sprint firmware.
I am 99% sure it will work all the same considering I'm running another carrier's firmware on the verizon note 7 already. Not to mention youd be flashing the Verizon CP, CSC, and BL back onto the device.