1) The game should actually challenge me to use all the gimmicky stuff in my arsenal. You cannot tell me anyone feels challenged in this game if all you have to do is sit on some hill with your tranquilizer silencer sniper rifle and klick on the 5 heads you see, run up, fulton everything you find and repeat. IF there would be more variety in enemy outposts, bases, big buildings Id have to sneak into i think Id have to use decoys and the box etc. Thats also why its bad to equip your arsenal before a mission and the idea that you want to spend as less as possible on it. Just take everything with you and make the game hard AF (enemies arent blind, kill you with 3 bullets, cameras, enemy sniper spotting you, patrolling enemies with dogs, more choppers etc.) so you have to repeat a mission a few times until you figure out the right way to use your arsenal to beat it. Even if I try to be sneaky and interrogate people and I fuck up, I can just run away cuz their shots arent hitting me anyway or I just turn around and fight them. I should be dead in seconds getting spotted in an enemy base.
2) Mission Objectives / story are hella boring. Its everytime either rescuing an ally or assassinate a target. I understand that thats basically what Snakes private army is doing in the warzones but lets compare it with Witcher 3 and GTA V, that have AWESOME quests, they all do have some background and twists within the mission that forces you to rethink your next step. In witcher 3 every side quest had an awesome story behind it that I still remember, like the girl that was in love with a werewolf or that weird building that teleports you into that dungeon with smelly cheese all around. I think they could have done a way better job in giving the player interesting missions that do have some suspense and new objectives that come up as you progress in the mission, right now all you have to do is press tab, read the 2 lines of mission objetctive, interrogate some idiot that you could just run up to and tackle him and he lets you know where the guy in question is, rescue / kill him, call chopper, go next.