It all depends on what you think the core of Halo should be. For 4v4, I think Halo should be focused on small to medium sized arena maps (which means no sprint), fast base movement to allow for strafing, equal starts, a good utility weapon that gives you a chance to fight the enemy at all times, and power ups/weapons spawning in certain areas of the map to promote movement and allow map control.
If that is met they can add anything creative as long as it's balanced and adds to the game play. So I'm not opposed to change, but the change has to add on in a meaningful way to enhance Halo's mp.
For example, Halo 3 tried doing that with equipment, but the equipment failed to enhance the game play. Regens were either too overpowered or turned 1v1s into a melee fest inside the regen. Bubble shield just slowed game play down by promoting camping (with shotty or sword) and served as a get out of jail free card. Radar jammer was useless and radar should be done away with in the first place, but that's another topic. The flare was just annoying for all players. The only good piece of equipment was the gravity lift. Equipment just frustrated a lot of players and the placement/spawning of the items made matters worse.
I would prefer for the mp to be competitive outside of the box. As long as ranks and matchmaking pair people up with the right people, I don't see why a competitive focused mp isn't best for all.