Russian Lan Dota just always seems to be really volatile to watch, besides NVMI had both Goblak and DKphobos - people that I know the players on Navi respect/like. Additionally it was a 25k first place lan prize or some such, which in Na'Vis world is not all that much. Let their buddies win for the first time on lan, pocket a few grand a piece ad they had a good time. (I'm not saying it was thrown, just saying the competitive drive to win as a meaningful accomplishment was in NVMI's favor by far.) When the finals was over there was a very friendly time spent between the teams congratulating/talking etc. I really don't think Na'Vi cared as much, plus you can always be Goblak'd in a best of 3 when its all Russian dota. Definitely should wait - besides everything can change when the patch hits. It will shake things up certainly. Strong teams right now will struggle hard with the patch, and other teams will get an early boost. And there is really no way to say who. It will just kind of Happen.
I think supports are at their most impactful as they have every been in Dota. And arguably the most impactful roles in determining the outcome of a game. The only western support duo that I really think of when I think about a teams 4/5 is EG's. That's not to say the rest of the western 4/5's are bad, but I think they are less consistently able to drive the outcome of the game they are in relative to PPD/Zai.