I just wanna say this game is amazing. I was initially disappointed because it was really different from the rest of the series, but once I accepted the fact that this was not the game I expected and valued it for what it actually is, I've been having a blast.
I'm 35 hours in (I usually played 1 or 2 hours a week at most before this), with 19 main missions and about 18% completion. After all in a weird sense it starts to sync in that all of this stuff that you play through (not just see in cutscenes) makes you really feel like you're creating that legacy people attribute to Big Boss. Like when you get an S rank or something and you hear "they'll be telling stories about this one."
The craziest thing though is coming to this thread and seeing people's approach to the gameplay. Things I would have never thought of like escaping via fulton/container, or using D-Horse for cover.
This might not be the game I asked for but it sure has been a pleasant surprise.