I'm actually quite surprised by some of the opinions posted here regarding MGSV. I absolutely do not mean this in a bad way. I have played the Metal Gear series going back to that Playstation Pizza Hut demo for MGS1 back in 1997/1998. For me, I have always found myself in love with MGS3 over all the other game that were its predecessors and successors.
I highly doubt that MGSV will have the love and adulation that we all saw for MGS2 years later as people re-evaluate it. I still find that game one of the weaker titles of the series, but a long explanation for it is neither here nor now. To MGS2's credit, I will saw at least that the game had a complete narrative even if it was somewhat poorly paced and incoherent in its presentation.
MGSV is just disjointed. You can obviously see that Hideo Kojima couldn't achieve everything he wanted to, and the story here suffers for it. So many things here are left open. Especially when you consider the ending regarding Big Boss and Venom Snake, the game itself lack characterization for most of its characters, long breaks in story presentation (due to the open world nature), odd dialogue in its story, and a twist made on a point that a lot of people didn't care about in a particular previous game. The game simply won't have the love of MGS2 because many consider MGSV unfinished, devoid of the character, tension, and essentially a villain that was engaging an actually fleshed out like Solidus was.
The gameplay here is phenomenal, even if the mission structure is repetitive. I also think the controversy regarding the implementation of FOB and micro-transactions will not go anyway to help this game's overall legacy. No one can deny that online features are a mainstay of a game, and will be part of a game's legacy (for better or for worse).