I really thought that the changes they did to Halo 4 would work out. I don't mind borrowing a concept from Call of Duty if it's proven to enhance the gaming experience. Other shooters borrowed regernerating health from Halo. No one cared at the time...
With that said... I think loadouts ruins a lot of the gameplay.
In Halo 4 you can spawn with a DMR, a weapon that can cover 75 % of Ragnarrok if you're in the middle. It's not like it was difficult or even hard work to aquire a BR in Halo 3, so why change it? To make the game more fast pace? That's the problem. Now no one cares about finding a weapon before going into battle, they just run towards the middle of the map and starts slaying. Weapon control is out of the picture and random drops rewards even the worst players...