A couple of additional thoughts on your EcoBoost.
1. The BCM connectors show the water intrusion, but the most troubling damage could perhaps be internal to the BCM.
2. Just curious if your car reflected any other potential issues with water? The underhood picture just got me thinking and...
Sorry for your situation. The fix that can be completed in 5-6 hours is the addition sealing to avoid possible water intrusion to the BCM. Since yours has the water intrusion in the BCM MY GUESS is that the delay is getting the replacement BCM.
Yours is the first one that I’ve heard about...
In addition to the battery state they apparently have a timer that does this after two weeks of not being started — regardless of the battery. There shouldn’t be any little things. Was never an issue on my 22.
I use a CTEK maintainer on my 25 GT and for several winters on my 22 EcoBoost. It does a great job with the battery. But, even with the maintainer attached the car will go into the battery saver mode and will not communicate with the Ford app. I do not start mine up once I put it to bed and...
No, convertibles do not take longer, but some dealers are obvious SLOW or INCOMPETENT. My GT convertible was about the same as yours. Took about 7 hours. The technician that did mine was very good. She was doing quite a few, including ones at the dealer which were on hold.
I forgot to include earlier that now that I’m in my 70’s I find that I need warmer temperatures — in the Mustang, in my Outback, at home, and wherever I go. So in my case it is ME that needs warmer temperatures!