My GENIUS idea
So after enraged solo infected gets one person, in larger lobbies they’re just kind of out of luck. Why not give a sort of scaling enrage tied to the ratio of infected to survivors? Once numbers get to around 50/50 or 60/40 infected to survivor, maybe set them to base speed? It would solve the issue of low infected counts essentially being impossible to win with.
For example in a full lobby(i dont know the actually speeds):
1 zombie enrage is 50% extra speed and more health
2 zombies 30% extra speed
<50%of players infected 15% speed
50% or more infected, no speed boost