I disagree regarding multiplayer and the graphics (though I wouldn't say they're the absolute best on PS3, but certainly up there with Uncharted 3). As for it being a "masterpiece", I agree with all who call it that. The title actually shows where others need to tighten up and the character models and acting just embarass most games (with few exceptions like the Uncharted series, Heavy Rain, and Heavenly Sword).
All-in-all, I'm nearly finished and would award it with a 9.7/10. Couple of glitches (though it's certainly not a "glitch-fest") and low-res textures, here and there, but a solid experience throughout and an easy contender for my GOTY.
I don't believe in perfection. I think the story is a masterpiece because the writing, voice acting/acting, paired with the superb animations. The gameplay while great is not a masterpiece though which is why i cant call the entire game a masterpiece.
The graphics are great when it comes to the main character models, but the world it's self is not as pretty as the characters and falls behind on games such as Crysis, Far Cry. Tomb Raider, and God of War Ascension.
However the voice acting like you said embarrasses most games. I think this is as close to hollywood as we have gotten and in fact i think the writing fits hollywood style perfectly. The only other game that I would say has a comparable voice-acting cast is in Far Cry 3 but even then it falls well behind the entire cast of "The Last of US"
Easily GoTY contendor. I will say it has been my GoTY so far and I think it's only competion right now is Bioshock infinite. I also want to say that it is now probably one of my all time favorite games.