Well, just to close this out, the Verizon CS rep who said I could exchange my 2nd faulty G6 for a new phone didn't know what she was talking about. All they would do for me was give me another refurbished replacement. After all that runaround, and some other billing issues I'd been having with Verizon, I sold the G6 and bought a Pixel XL on Swappa, and have left Verizon for Fi. ***Edit to clarify: I sold the refurbished G6 that Verizon sent me, not the one with the bad headphone jack.
All in all, I greatly preferred the G6 over the Pixel. I miss qi charging, and the bluetooth is spotty on the Pixel (an issue I'd heard about). But I have a working headphone jack, Fi service has been great in my area, and best of all it's nice to have a phone with no bloatware for a change!
I will definitely miss my G6 though, hope everyone here is still enjoying theirs!