Everyone complains about WW, but fid and pant are just as bad. A pattern emerges.
Their win rate is nearly identical at higher levels. If you break down how each jungler is doing based on win rates something becomes apparent: any jungler that has the following three things is towards the top and as you go down they have less and less.
1)Can farm endlessly without having to back to heal. 2)CC that requires almost no skill to apply 3)Damage
What does not seem to help in the jungle after looking at win rates is: skill shots, tankyness, utility, or speed.
It seems that the jungle needs to be rebalanced to either lower the advantages 1-3 gives or buff the benefits from playing a skill based, tanky, utility, fast clearing champ.