While his viability is yet to be seen firsthand, this is quite possibly the most overdue buff I've ever seen. Nunu went from passable to garbage the second the jungle was reworked, and these were instantly the buffs I imagined would make him competitive again.
I like how they managed to keep his power in lane as a support the same and improved his jungling status. I think, however, instead of receiving the same buff from Blood Boil as when he uses it on someone else, i think he should at least get an AD bonus for using it on himself.
THEN he would be pretty okay in my opinion, but he's far from the best. Christ, I don't even know what the tiers for jungling look like anymore, let alone draft.