Season 5 brought harsh changes to jungle sustain, Season 6 officially is breaking the jungle
Now you can only start with one HP pot, because some champions can't even get through 3 camps with 2 pots. And stealth wards are being removed, so the whole, "as a jungle who can have good vision control to help your team" is out the window. Have fun being afk farming on sustain junglers. Don't worry, the new minibaron will give you another source for Sated Stacks.
What the hell, Riot?