He's right about the cutscenes and all, but to my mind misses the biggest problem with this game.
It is NOT a stealth game.
I have played MGS and MGS2. I wanted to love them, I really did. But they just weren't what they were meant to be. The old Splinter Cell games (not so much recently, though) were stealth games because they were about more than just dodging enemies. There was some complexity there. Likewise with Thief. You could play Deus Ex like that as well.
But MGS is, and always will be, Pacman with fancy graphics. Sure, it looks great, but in the end all you are doing is moving around a mostly linear level avoiding roaming bad guys. There's no real 'stealth' involved here, just timing. And I hate that.
If you want a true stealth game, go back and buy Splinter Cell: Chaos Theory and play the hell out of that instead.
PS - "PMC" means "Private Military Contractor". PMCs are part of companies like Blackwater who are hired by the government to aid in peace-keeping and VIP protection, that sort of thing. It's a 'topical' issue because there are loads in Iraq right now, and because some of them have a reputation for not adhering to the rules that enlisted soldiers have to stick to.