A) you don't get the album artwork with Bluetooth
B) your phone isn't charging over Bluetooth
C) I used to just keep my Bluetooth turned off to save battery
Yes - it is convenient to have the phone in your pocket, but I'm often using Google maps anyways, and since that drains battery, I need to have it plugged in anyways. Now I need to use a cigarette adapter to charge because the USB port is malfunctioning.
A.) I don't need to see the artwork on the iMID display as it's visible on my iPhone if I want to see it.
B.) In my situation, I never go through my entire battery in any given day. Only charge it at night while I sleep.
C.) Bluetooth stays on 100% of the time on my phone and I still don't use my full battery during the day.
However, I accept that you have different preferences to mine. My comment is only my opinion and personal preference.
I still have yet to try USB on my 2014 civic with 9.2, but hopefully I'll remember later and I'll report back here if it works or not. If mine works, then you might need to do a restore as I restored to 9.2 fresh.