and now I've just finished the microwave hall and oh yay it's another naomi speech.  
this game really is the worst kind of fan service.  I think they had a shitty time developing it, then decided to cover it all up with cut scenes and fan servicey stuff...the gameplay to cut scene ratio in the last 3 chapters really screams that.  And none of it is all that well thought out.  Even the boss fights are lazy.  There's just so much dumb shit.  Every time there's a woman on screen, the camera inspects her every angle.  Whenever Snake does anything, he starts coughing up a lung like he's gonna die right there....after the 20th time it's like alright, I get it, he's dying.  Naomi says the same shit over and over about atoning for sins and fate and blah blah.  They use Raiden as a deus ex machina a couple times.  Mei Ling is some clumsy ditz.  The marriage proposal.  
spoiler (click to show/hide)
Psycho mantis popping up for no reason at all...right after you run through the damn MGS1 map, which you think is already a full serving of MGS1 fan service...yes, I know, that game was fun Kojima, I wish I could be playing it right now instead of crawling through this microwave hallway of a game.  
Naomi's cancer is as random as this: 
but the Rex vs. Ray fight is fun for a minute.  in a better shell of a game, it could've been a much cooler moment.
man, I forgot just how bad it really is, so i had to vent...I gotta go make some tacos.  that'll make the last 2 hours of cut scenes bearable...and then I never have to play it again, ever.   
It all starts to go to shit with the rail shooting part on Drebin's vehicle at the end of ch.2 and never recovers.