LH confirmed Z class is no longer upgradable. The agent mentioned that was a recent change. Just my luck if that's true.

After almost an hour on the phone with the CP line, the agent mentioned that LH wouldn't budge on F tickets due to LH being greedy with rev share. Sounds more like US isn't willing to pay their portion of F space. Very annoying.

Best US offer was to rebook on the 332 FRA-PHL but I'd have to pay about $200 for the fare difference and would have to fly another day. I'm considering it.