What they should've done was only have the main unique missions in the actual campaign but then given the ability to replay all the missions with the extreme/total stealth/subsistence parameters for extra bonuses and rewards for completing it.
Ugh. I loved the experience from a gameplay standpoint but from the story's standpoint I just don't understand how it got so many 10/10 scores from countless outlets.
I loved some aspects of the game. The stealth gameplay is unparalleled in quality and depth and the Fulton extracting mechanic to build your team was flawlessly executed in my opinion. The first chapter of the story was really well done as well, despite Skullface being a generally underwhelming villain. I liked how Kojima's storytelling blended real world problems like racism, genocide, child soldiers, and aggressive foreign imperialism with surreal and supernatural elements seamlessly.
However, I hated how padded the game was. 157 side ops is cool from a distance but under the microscope you realize that it's more like 6 or 7 (not including the unique ones) repeated 10-15 times. The second chapter should not be considered a chapter in my opinion.
After playing with it off for a few hours... I turned them back on lol. Found it was too much of a hassle on DM! to keep note of the execution prompts and it was costing me earlier kills. To each their own, eh?