Just a quick update from HKG
As an Elite you can use the CX Business Lounges, which are far superior than the Thai lounge that they will suggest you use.
I used The Pier and it was more like a first class lounge than a Business Lounge (there is a First lounge also). 3 different dining options, fantastic shower facilities and amenities (Aesop).
I believe Koru must use the Thai Lounge and Gold can use *A Lounges such as SQ or United if they want.