Since the leveling system is pointless make a use of it my idea is to whenever 20 levels you get 1 free friend slot
They don’t mention this specific idea though.There has been made a suggestion about this already which is forwarded here:
LEVEL REWARDS
To be honest the levels we achieve through experience after killing a player or after winning a game or also after completing any of the 3 daily missions is currently quite useless since you are not rewarded in any way, and and to solve that I...www.cubecraft.net

.I wish you some good coding skills and health. Also happiness obviously