A history of my experience; I've played Halo extensively since Halo 2. I will always be an avid fan of the Halo multiplayer.
I have played Guardians multiplayer for approximately 20 hours to date. I must make a plea to 343i to alter an aspects of multiplayer.
From my understanding, the radius of the radar has been reduced to 18 ft. I am unsure how this compares to other Halo's radar radius. Regardless, the radar has become worthless in my opinion. The radius is far too small to be affective. Because of springing/thruster pack, player movement has increased significantly since past Halo's. And with Guardians' current radar, it is worthless because enemies are barely visible before you're being flanked.
I understand MLG players were consulted about Guardians' multiplayer. If they wish to have a more MLG experience, then make an MLG playlist. It's unfair to subject more casual players to a neutered, yet critical component of multiplayer tactics.