As of recently, I really got into Infected and what not, but I realized it lacks some information
Similar to KitPVP and how it has it's kits, my suggestion is to make it so that Infected shows the stats of what you get when you rank up or when you buy a kit.
Example: In the lobby area (where you choose the map) there should be signs that show what each kit will get (enderman gets 5x ender pearls, skeleton gets bows, etc.) or what you get with each rank up (ex. a new piece of armor, an apple, a frag, etc.)
Just a simple addition :)