I never expect SWH to be a serious contender for the WC title all the time. But, he does stay within the top 10 for a long time, even until now. At least, he has one bronze WC medal. I agree that the quality is still there. But, compare to the previous years, this one is slightly less quality. Well, if talking about quality, let every players prove themselves. The five players that you mentioned are the prime candidate for the title, though I won't completely rule out CL.