I also have a 2015 Jeep and
I also have a 2015 Jeep and hate the start stop. I checked with the Chrysler dealer and there is no way to permanent turn this hated feature off.
If a consumer doesn't like it, he/she still has to press the "A" button each time the car is turned on.
Each time I start my vehicle, I go through a routine of turning off the start stop and also turning off the music system (there is no off switch that keeps the radio/music off....it restarts each and every time you start the car.
Also very annoying but no way to overcome this either.
I swear I will never buy another vehicle with this feature.