Nerfs to early game, buffs to late game. It's balancing.
Nerf to his earlygame where he is arguably too strong, buff to his lategame where he struggles. This is actually a well thought out change.
They clearly want people to max Q instead of W.
I think this is a good change and what players have been asking for. Nerf to his early, buff to his late. Also, seriously, ww kit is good and it's not frustrating to play against him (compared to Shaco, Wukong, Jax, Zed, Fizz, ...). His winrate should drop, and pick/ban as well, I like it.
WW typically maxes W first for the extra attackspeed / movement speed. This is definitely a nerf, not a buff.