I tried editing the Special Infected's speed in hopes of not relying on the Superboss/Super Infected plugin. But somehow none of them seem to work properly, the health works though.
I just copied and pasted these on my server.cfg and had them disabled now.
Spoiler
//
https://developer.valvesoftware.com/..._of_L4D2_Cvars //
// Smoker //
//sm_cvar tongue_health 300 // Default: 100
//sm_cvar tongue_victim_max_speed 1750 // Default: 175
// Spitter //
//sm_cvar z_spitter_health 300 // Default: 100
//sm_cvar z_spitter_speed 2100 // Default: 210
// Boomer //
//sm_cvar z_exploding_health 150 // Default: 50
//sm_cvar z_exploding_speed 1750 // Default: 175
// Hunter //
//sm_cvar z_hunter_heatlh 750 // Default: 250
//sm_cvar z_hunter_speed 3000 // Default: 300
// Jockey //
//sm_cvar z_jockey_health 700 // Default: 325
//sm_cvar z_jockey_speed 2500 // Default: 250
// Charger //
//sm_cvar z_charger_health 1380 // Default: 600
//sm_cvar z_charge_start_speed 2500 // Default: 250
//sm_cvar z_charge_max_speed 5000 // Default: 500
Edit: I have also tested lowering the speed and it just slowed them even more. Increasing it doesn't seem to work.