The Jungle is destroyed

The reason why jungle is destroyed is because now junglers are going to be underleveled no matter what, and there is not enough gold to keep them relevant. Junglers would gank at level 3 when they hit their spike earlier than the laners because they were stronger for that small period of time, get the gold from the kill, and be worth something. But now they can't do that, they are forced to be behind. The only way to make it to where junglers are still viable WITHOUT having to gank lanes and snowball the heck out of the game is by making camps respawn faster or by making the camps worth more gold (or some combination of both). This way they are still worth something in teamfights later on but don't have such high control over the early with the XP changes.

You balanced one aspect but shit on the other Riot. I'm honestly not surprised. Now I know you won't listen to this post and you'll probably just keep the jungle in a horrible spot for a while before buffing it to OP but these are just some things to consider. The problem wasn't leveling so much, it's just that the camps don't respawn fast enough or give the right amount of gold to where it feels like you are losing something.