I live in Arizona. Yeah the heat does slice off life from the battery, but, I've never had a battery go bad after just one year. No, not running the car in accessory mode or anything like that. Once the warranty is expired, I'll definitely look for a good aftermarket one. The car before the Accord I owned for 5 years. Never had to change the battery. But, the dealership did say that the batteries in the 10thgen Accords are awful.
And yes, I took my car to the dealership for the Bluetooth issue. The service department said that as long as the Bluetooth was connecting, albeit 30 seconds to several minutes later, it was considered normal and they couldn't fix it as it was working fine. They even witnessed the lag. The second time I took it in for the Bluetooth, it took nearly 5 minutes for it to connect. The dealership blamed my phone. I've tried 3 different phones over the 1.5 years I've owned the car, and BT connectivity issues across all devices. Maybe when I get some free time I'll bring it to another dealership.