The radar is a joke. Literally in a 1v1, then all of a sudden getting smacked in the back by someone who is basically running (sprint adds hardly any mobility/speed) because they are hidden on radar. This is a TERRIBLE addition to the game and weakens any competitive integrity. It doesn’t reward smart play. It rewards nothing. It makes the game casual as hell.
Revert to classic Halo to where you are only off radar if you are crouch walking.