Bring back braaaaains!
It was by far the most popular infection game type in Halo 3 and Reach.
Put the weighting so it only appears in the 3rd slot every time and just see what happens! If it’s popular, keep it! If not rotate it out.
Let the Flood keep their speed, jump height, and abilities to help with balance. Maybe even take away human armor abilities.
Sure humans will still have the advantage but I watch The Walking Dead… Humans are supposed to have the advantage!