1. You may not be knocked out of scope, but this has been replaced by flinching, which I feel has more of an impact than just getting knocked out of your scope. If you've ever been trying to snipe someone and gotten hit it throws off your aim quite terribly, forcing you to readjust your aim and compensate for every hit you take. It's not as easy as you may think.
2. Sprinting is a natural part of the game now, just like jumping. Anyone who can't accept that is simply going to have to get over it. You may not like some features and mechanics that have been added, but they're here to stay. Ordinance is similar to care packages in Call of Duty, yes. However I don't find them to be implemented badly, nor do I think that they're a game breaking feature or make the game feel less like a Halo game. I can say the same about instant spawns. If given the choice between instant spawning and a countdown timer, I'm really indifferent. I've rarely run into a problem with the instant spawn system and it rarely makes me rage or feel cheated, if ever.
These features hardly make the game Call of Duty in space like some people are calling it. The physics, the feel of the weapons when you fire them, the jumping, the movement, the grenade throwing, it all feels just like I expect a Halo game to feel. It all feels very familiar, so much so that I could pick it up and go "This feels like Halo.".
3. They're implementing a ranking system that is set for release sometime next year. It won't be visible in game, but you will be able to check Halo Waypoint for it. It may not be in the game as some people wished, but at least they're still getting a ranking system and can view it in some form. It isn't difficult to visit the Halo Waypoint app or website and check it out. Think of this as a compromise of sorts for those who were in favour for a ranking system and those who either did not want ranks visible or simply didn't care.
Also, I play the game to enjoy the gameplay. I feel that the gameplay comes before all else, including a ranking system. My incentive for playing are the different unlocks to customise my appearance and playstyle. It's been more than a month since release and people are still playing.