Jungle role is feast or famine right now. The changes put out at preseason were not well thought out
You get flamed more for being lvls behind. The jungler that wins is the one that was ALREADY ahead. Then if things are looking south you get told to go "farm" yet if you try too even with the faster spawns, someone on YOUR team is either in need of a gank or just feeding like any other league match but wait if i do show up to the pings i am in no shape or form to fight because once again... IM BEHIND ! The role also feels less independent, rather more DEPENDENT on not having a feeding team.
If you wanted to nerf the role you could of done it in much more healthy way by just tweaking exp gained from minions and assists so when a jungler does a successful gank its not as rewarding and more punishing if the jungler tries to tax exp, then maybe lower the HP as well as the HP scaling of all the monster camps to give junglers an incentive to stay in the jungle and farm more often since it would be less time consuming then nerf the jungle items
make them less effective separately then more as a whole or decide to nerf the power altogether to still have leverage to give junglers more exp per camp.