I think, as far as balancing is concerned, they need to focus on sprinting.
Really that's the ingredient that separates games like MGO2 and TLOU Multiplayer from games like Call of Duty. If you could sprint without penalty in TLOU Multiplayer it would be a very different, far less tactical game.
There are a few things they could do. Nerfing E-Locators would make being marked less of a novelty, which would probably make players more cautious about appearing on the enemy radar.
Perhaps making players automatically get staggered if they are shot in the direction they are sprinting. I'd have to play the game with that setting to see the domino effect of what that would do, but I imagine it would result in less careless sprinting, and less sprinting towards enemies.
I think that Stealth Camo being drained heavily while sprinting would also discourage it.
Basically they need to tune the game so that sprinting is used in bursts to cover distance, or evade, rather than used without thought. Appearing on the enemy radar doesn't seem to be enough alone. If sprinting occurs less, then the pace of the game would naturally slow down, and it would become more tactical as a result.
