@Meddler Changes to the jungle will further push out some champions
While I understand jungle has a huge influence on the game, there has been a problem in the jungle for a long time now. Emphasizing the importance of scuttle further pushed these changes to the point that anyone who isn't any sort of duelist gets bulled out of the jungle.
When one jungler is often behind there is often very little they can due to catch back up (between the enemy counter jungling and the team trying to recover gold by killing jungle creeps). This is why duelists (Lee Sin, Graves, Camille, Xin, Kha'zik) have been increasingly meta in the jungle vs. traditional tank/cc junglers (Amumu, Rammus, Sejuani, Naut, Warwick).
It's not even just tank junglers. regular melee junglers who just just either lack mobility to compete with the others and damage (Udyr, Shyvana, Tryndamere, Trundle).
I also would recommend maybe making a Tiamat jungle item to help these types of junglers, since the majority of them already build Tiamat, and the other jungle items just have weird/awkward stats for them.
Tl;dr Lower the damage on the current duelist and help traditional junglers.