It's the least offensive thing in her kit. When's the last time you saw somebody get all pissy about her W? It's not what makes her annoying, or obnoxious to play against. You're only hurting mid lane Morg. And with all the mobility floating around this day and age, mid Morg wasn't exactly broken.
If I were them, I'd have done the opposite. Nerf the duration of her Q or E and buff the crap out of her W. But that's just me.