I really love CoC. It's one of my biggest and oldest favourites in the whole rpg hobby. Sadly I've played it less the last few years. I really need to remedy that.
The new combat rules I really like, with all rolls being opposed. That feels like a good thing with the new edition. I am also carefully optimistic about the chase rules. If they work, I guess you could import them to Savage Worlds, as PEG Inc never seems to get those right.
I'm really looking forward to a CoC AP with Stu as Keeper!!