Masterpiece? Eh, the story jumps the shark pretty hard, with the tadpole plot being "oh yea, i have this magical npc in my back pocket that I control, don't worry about it". The actual world/gameplay/cinematics however were top notch. Almost everything you doing with npcs throughout your playthrough being meaningless at the very end was a huge disappointment.
Also, "thoroughly polished"? Are we playing the same game? Starting in Act 2, there are a ton of broken quests, bugs, etc, and it only gets worse in Act 3.
I have to disagree with your review. It's a great game, no doubt, but masterpiece? No. Masterpiece for me has to be consistently incredible throughout and not have any moments where you think "oof, if only they didn't drop the ball here".
