Most of the time, heroes that have never been seen before or are rarely seen attract people yo your server. just an opinion, 50 shots with the Noob hero is way overpowered. I do hope you have the max level cvar version of Noob. Try to find the best combination of heroes and what levels you can get them at (make it so it isn't impossible for a newbie to kill a higgher level). My last suggestion is try to stick in between of Fast XP and Slow XP.