Well, I haven't played it yet, so I don't know! The reason I love MGS3's gameplay the best is because of the ability for different play-styles and the cqc combat. I'm a melee guy, so that's why I preferred boss battles like the Boss, the Fury, Volgin (round 1), Gray Fox, and Liquid, even though the End is probably the best designed in the series. If I ever get a choice between guns and fists and grappling, it's always fists and grappling!
I'm kind of worried that this is more of a Ubi-soft MGS game. Although, the good team, not the Assassin's Creed teams. Speaking of which, those games get a lot of "9/10"'s from critics, and I'd say the gameplay in those is around a "4/10." The only parts I enjoy are the tombs because they took some brain power like Prince of Persia.
Thanks pturtle! Phew...I'm glad Big Boss is included on that list!