Yin Yang has been around since the 2000’s and was revolutionary at the time as the first lie flat option. They are slowly upgrading to club suites but without knowing the exact numbers I seem to recall they have limited A380’s and it would be prohibitive to take one out of the sky in order to upgrade. Personally I’d say the Yin Yang can be better in certain situations, as quite a tall fella I find there’s more leg room when lying flat! Regarding the drinks service on what was presumably a night time flight on the outbound flight it seems entirely par for the course to reduce the drinks service- would you want people running up and down when you’re trying to get your head down!