...There are no nice, genteel words for the "decision process" that spurred this change. This is straight-up congenital brain damage. I guaran-fscking-tee you that all bugs filed against this change were closed with the sniffy, "NOTABUG: Working as designed."
Google Authenticator was correctly designed from the outset. You do not create a single target for adversaries to attack. You distribute the secrets and ideally isolate them so that adversaries have to compromise thousands of systems instead of just one.
As for, "What if you lose your phone?" Well, what if you lose the keys to your car, or your house? You don't expect the home builder or car dealership to chunder up a duplicate, do you? The ability to export your GA credentials has been there for years. Save them to a USB key and put it in a safe place.
Meanwhile, I'll be transitioning completely over to andOTP.
"Don't be evil," has been dead for a while, but I had hoped they would have at least held on to, "Don't be stupid..."