Reposting myself:
Good news, look at the second-to-last paragraph of the letter attached to @NikosAlexandris’ new, debugged C2 (to Finland and back in only 3 days):
“We’re working to deliver recovery mode via over-the-air software update.”
So it looks like once you get your C2 to work, any future bricks should be salvageable without sending it in for repair. At least, once said software update is out.