East, for not subsiding in 3NT as the auction dictates that most of partner's values are in hearts and clubs. Imagine ♥KJ ♣AQJ and there's not much space left for the suits that East is interested in. Isn't a typical West hand some form of 3325? That makes slam even harder especially the spade situation and if West doesn't have the ♦K and they lead a club, there's hardly time to unblock hearts. I'm also in the 2♣ camp with West's cards. Even at matchpoints, 1NT is going a little far for me, what's wrong with a really good club suit to show that we may never be able to do so if we don't bid it now?