Pro players complain about everything tbh. I agree about the length of the games.. can be too much- But it not happens all the times either that they so long. And I dont think the MAP VETOS should be THAT important, in a MAJOR! Its not a tournament that happens every 2 months.. But whatever. I know the IEM Katowice is Bo3 so oh well. Just give them the million prize pool in a grand final that ends in less than 2h ;). why not..
And Dota2 TI8 was a bo5, 5 matches, while at the SAME DAY they had the losers finals. so they played bo3, and bo5 at same day. "Yea but Dota2.. is not so mentally exhausting as CS", is not true either as i hear many times.. and the TI8 was one of the best tournaments ever, and esports analyists also agreed to say it was so good and "epic".