I completely agree with this list (although I'd definitely add Castillo)
I want to point out though, regarding the MBs, that many of them have had great performances in this WCH. Besides the top 4 you've mentioned, there's also Maglio, Jineiry, Weitzel, Hattaya, Stevanovic, Ogbogu, Janssens and perhaps others I am forgetting right now, who may not have been noticed because of their teams not advancing/performing subpar/having other players that steal the spotlight, but I feel deserve the recognition
Indeed. I think at both this year's VNL and this WCH the position with the biggest number (by quite some margin, I would add) of high-performing players is MB.
Also, I don't think there is much doubt that the 2 best setters in this competition are Macris and Drca. Is it a coincidence that their teams are the ones who have arguably showed the most thus far?