1. No more KA and CX (or CX and KA... whatever) lounge... Only CX lounge now....
2. Never been to other lounges in PVG so can't comment on this...
In PEK had been to both CA First Class lounge (by using PP) and the paid Business Class lounge (also using PP, which is if I remembered correctly is the one use by BA)...
I'd say unless you want a shower there I'll stick with CX lounge