NHTSA Complaint #11708369 — 2023 JEEP WRANGLER

My battery recall was completed by my dealership (FCA 68C) and then once I received my car back my mpg dramatically dropped from an average of 32 MPG combined to at BEST 28 MPG combined. The recall states that they will do a software update for the battery and that if it is not resolved then they will replace it. My concern is that now my MPG is so much lower, what software update was completed? Did this reduce the capacity of my battery in order to prevent if from overheating/possibly igniting? Is FCA cutting corners in order to prevent having to replace the entire battery when they should be doing so? I also noticed that my car is NOT switching to electric motor when it should be. I drive the SAME route to work every day and my battery would get me to work and back, now it does not. Now, about two weeks after my recall was complete it is back in the shop due to an engine light illumination.