Blue buff nerf, new jungle items, increased monster health, Blasting Smite
The new jugnle severely shifted balance: Jungler who can afford an aggressive smite and those who cannot.
With the increased monster health and worsened mana sustain in jungle items a lot of champions (Hecarim... Sejuani...) are forced to pick Blasting Smite in order to make it through the jungle.
This creates an imbalance with junglers who used to be "on the same level" (balance wise) but now have the option to pick a duelling smite without loosing cleartime.
Imho Hunter's Machete should gain a slight buff to mana regeneration.
Ranger Trailblazer.
This is to make up for their lack of sustain, and high damage sustained in the jungle.
However, the 20% missing health means that the heal is actually 12%, 8% usually, something that gank junglers that can afford
Stalker's Blade usually have innate in their kit.
Thus the item only helps partially bridging that weakness.
. I was really supprised I runned into mana problems with a
. He rarely use mana so I can understand the feeling for junglers that really use it.