So why do you think Space Wolves are dominating the tournament scene?
Sure they are a newer codex and codex creep is certainly a factor, but Tyranids and Blood Angels seem to be struggling and they are the latest codexes.
Let's look at the Nova Open where they had a ton of Space Wolves and the worst one went 2-2 and they had 5 out of the 8 top finishers playing Space Wolves.
I played them at the team tournament at War Games Con and it was like playing Chaos on easy mode.
I am going to post a very long article on why I think they are doing so well, but what does everyone think the reason why they are doing well is?