First of all there is a lo of topics about this.Second of all (This is my opinion) They did not ruin the game. It depends what style of play you want. Classic or New. I like classic better Halo 1,2, and 3 but Armour abilities are still fun.
I hate it when you get a weapon or vehicle that is awesome and a teammate kills you for beating him to it.But like A-Dog said if you shoot a rocket at someone and a teammate is right beside the guy you are shooting at Both of them should receive the amount of Damage that they are supposed to receive.
I won't let me either. He has his opinions and I respect them but I think he is completely wrong in my opinion. Master chief touches Samus and she dies.
That is your opinion some people have got bored of covenant and want to fight a new enemy. It maybe a different enemy but it is probably going to be good enough for halo.