My personal opinion on jungle problems and my personal idea for a solution
The problem with the jungle is that if the jungle is too weak then laners will cheese it for early lvl2 and easy lane win which means that lane is decided by which side you play on not if you are better than the enemy. And if jungle is too strong then junglers get rekt in their own enviroment.
Now this created more problems cause riot introduced jungle items. First thing is that if jugle items are strong enough to function, they are realy op and cost effective so laners might just go to the lane with smite and cheese it. And if jungle items are too weak then junglers get rekt.
So what is the universal problem here is that riot needs to make jungle unatractive for laners because it leads to heavy cheese. They tried by making the jungle too powerfull, which rekt junglers, now they introduced jungle items to pull the junglers up but the items are too strong and laners start getting them.
So my owerall conclusion is that riot doesnt hit the right spot (yay im a genius).
My personal solution is to change the aim of ballancing the jungle. So that jungle camps will be weak for junglers to clear, but wont provide laners with the thing they always wanted from there. Which is the experience. The laners always invaded jungle to get that free or fast exp, they even took smites for that reason, it was always either to cheese that lvl2 or to get safe exp when they lost the lane.
So simple fix would be to a)nerf jungle exp hard b)make jungle item increase the exp you gain from jungle by a big amount
This way laners wont go into the jungle since they will lose more than they will gain (hp during the fight, and they will be a minion or 2 faster at reaching lvl2 which doesnt allow for cheese), while junglers wont require to be plainly op to even exist.
If there are any errors point them out so i can fix them.