Finally reached GM! Here are my takes.
Within three days, the GM count went from 20 people being GrandMaster to 100+! Very interesting that suddenly a burst of people which I can't explaint. So do I like or hate it? Well, honestly, my over all feeling is extremely mixed!
(+) It's quite realistic that not everyone is GM, because it should be difficult to be here.
(+) The reason people hated S2 is that they thought they deserved GM, but suddenly their old way of playing wasn't enough. People (including me) falsely thought they were "the best of the best". But this will be fixed when people know what to expect.
However...
(-) If you fall behind, it's extremely difficult to come back. In other games you face easier opponents when you lose a lot, but now you get matched with better and better builds every day!?!? So you fall exponentially behind. This is extremely bad, because one loss just spirals down and a person that should get into grandmaster can lose -100 points just by having an unlucky start. (If you get bursted, the perma-build items will never activate, so next game you have one less multicast and that makes you lose the next game too... and then you just lose all the games). Would not be a problem if you faced easier opponents.
(-) The first days are very important and also very random. Do you face an opponent that went 0 items? Do you get the cheap items? It's simply luck if you get an easy win. Having two losses early is so bad lategame, but nothing really compensates for this. And if the answer is "git gut"... No! Early game is extremely simple, and since you don't have that much money for rerolls, you are very dependant on the items that pop up.