yeah, now they've created a situation where warwick isn't viable without it. Warwick wasn't a top tier jungler until they changed the jungle items and the jungle, so what's really the problem here? they should have nerfed his interaction with the item, since that is the problem. an appropriate fix would have been
Skirmisher's Sabre
RECIPE Hunter's Machete + 350 gold
PASSIVE - CHALLENGING SMITE Smite can be cast on enemy champions, marking them for 6 seconds. While marked, you deal 18-69 bonus true damage to them on hit basic attacks, have vision of them, and reduce their damage to you by 20%.
PASSIVE - JUNGLER Deal 45 magic damage on hit to monsters over 2 seconds and gain 10 health and 5 mana per second while in combat with monsters
problem solved without nerfing anything into the ground.