Currently, on the Preseason 2020 Gameplay: Rise of the Elements, a small portion of the rundown denotes the change in experience to make certain roles more or less powerful. For example top laners are going to be getting more experience from minions, whilst bot laners are going to be getting less. The most baffling part of all of this, in my opinion, is how they're yet again reducing the amount of experience junglers get from camps.
The Jungle role is currently in an absolutely horrible state. It is no exaggeration to say the jungler has the most influence over the map. Generally they can put all their lanes in an advantage and snowball the game that way, or alternatively, they can camp one or two lanes to the point that these lanes are able to carry on their own. This has become such a recurring theme in games that the term 'jungle difference' has become an unironic statement and more of a truth.
This is the jungle meta we're currently in and as such has greatly reduced the number of viable champions to play in the jungle if you want any chance at winning, especially in high elo. If your champion is unable to pressure the map early, then the chances are you are going to have lost the game before your champion is able to do anything meaningful. We have been in this meta for a long time now and Riot have attempted to 'fix' it twice before - both by reducing jungle experience. Both times the changes did nothing but exacerbate the problem. Scaling junglers who rely on levels, such as Master Yi, Shyvanna, Amumu etc. are getting pushed further and further out of the meta, whilst the junglers that are able to gank are being pressure to gank more and more as farming their camps simply isn't worth it, whilst making them feel less rewarding to play, as they can't keep up with the carry potential of their laners.
And with all the nerfs to vision, aimed at pro play, this makes playing against champions such as Lee Sin, Xin Zhao, Rek'Sai and Jarvan IV an absolute nightmare to play against as playing aggressively at all invites them to visit your lane.
I truly hope Riot looks at some other, more creative ways to tweak the jungle to make it feel more enjoyable to play, whilst being slightly less overbearing on the rest of the map.