Yes have heard about the Coutts Silk, their Gold card is also changing to the 'Coutts Black' card. Not many changes except now includes priority pass, scraps concierge trial and coutesy of coutts, adds sentinel protection.
Interesting change to the gold card. A la mode these days I suppose. Interesting to see what it looks like.
Regarding CoC I imagine its improving, otherwise a real waste of time and money. Though I did use it once for ebookers though and saved me a few bob. Still, transfer partners or e.g. good wine deals with BBR would be better - bring on avios!