WW has his place in certain comps.
He does a very good job top lane against some of the early game dominant champions. His sustain is so high that he can just sponge harass.
His jungle is sub par anymore. But with a jungle rework in the works that might change.
His ultimate can be exceptionally good, especially against teams with little interrupt.
He's great for teams with synergy with AS since he can give his team mates a substantial amount of AS.
I really like him for ARAM for that reason.
Over all, I'd say he's a perfectly viable niche pick...
But certainly not OP.