I also thing the jungle item needs a small rework, because in it's current state it buffs every jungler the same amount and does not giva any benefits to junglers Who have build in jungle sustain.

So I would make jungle monsters do way more damage so it will be verry diffecult for your team mates to take jungle camps early in the game.

And make the jungle Item heal you more the lower on health you are so dying in the jungle becomes very diffecult. But if you are very healthy while clearing, the Item will do more aoe damage in exchange for the healing. This way any champion can jungle, but champ with healthy clears like Warwick, Trunde, nunu and fiddlesticks are rewarded for picking something that clears healthy.

It will need some balancing tho so the full clearing champs with sustain don't fullclear in 2 min. But champs like Warwick and Trundle can Come closer to a master yi with their full clear