The first level is most definitely a MGS game. Unique voice acting, level design, action, gameplay mechanics. The works.
Then you finish that intro and it's a complete 180 - now it's open world, no more voice acting, no more cutscenes, no more story. Just open world diarrhea with assets they most likely finished and could use in the game.
It's as if the studio finished the first level, Konami pulled the plug and cut funding, they told Kojima wrap up with what you have and we ended up with this totally shallow game.
I felt like the game was a bait n switch. How far off base am I?