And I found the FM B789 Business Class to/from BUD perfectly OK: the lack of IFE content (bring your own entertainment) was offset by the best bedding I can remember. BUD lounge is rubbish, PVG Terminal 1 MU lounge is not the best and PVG Satellite 1 MU lounge is better. Cannot comment on the PVG international to domestic and domestic to international transfer. FM B737 business class is OK for 2-2 seats and usual Chinese airline food - just happy not to be in economy. I'd position to BUD for FM to SE Asia happily when the price is right. And it all adds into my AF-KLM Flying Blue Miles.
I am not sure what you are talking about man. BUD Lounge is one of the best lounges in Europe. It's never crowded, food is great and the Internet is fast. I just flew from BUD-LHR-ORD and the I visited both Amex Platinum Lounge and the AA Lounge in LHR and I'd rather get stuck in Budapest.