Honestly, if you asked me 40-50 hours in I would agree with a 10/10 review, I was amazed. It felt like a legit tactical shooter. Took me 60+ hours to finally realize its at best, maybe a 8. Its missing key parts of the plot, repeated missions, complete and utter lack of any coherent story (70% of the missions amount to fetch this guy, kill this dude etc.) and really it lacks the soul of MGS. No whimsy, no overbearing commentary on the military industrial complex, no nothing. Its just a game with amazing gameplay but no soul that sucks you in but forgets to tell a story.
My least favourite memory of this game was getting dropped off and thinking like a traditional shooter mentality cover here, shoot that, then someone said Big Boss, it finally dawned on me I was playing a MGS game.
You can clearly tell when Kojima got kicked off the project and in all honesty, it feels 3/4 finished. Combine all these elements with this stupid horse armor dlc and really, you have a game thats fun to play, but nothing more beyond that will leave you with some pangs of regret for having gave them more credit when it was due. It pulls you and makes you think wow, this is gonna be a thrill ride, and by all accounts, it is fun to play, but in the end it leaves you wanting more, or at the very least, a finished product.