I can't verify but to me it feels much better after the change. Granted the last time I played my purple IOEd and pvp IOed perma hasten plant dominator was back in 2011 but when I recreated her as a controller my spawn clearing time feels really good. What slows me down is when my carrion creepers doesn't move as fast as I do from spawn to spawn. But usually with +4x8 mobs my rotation of Seeds -> Freezing rain > roots > tornado half the spawn is dead from the dmg of my carrion creepers and after the initial confuse alpha they hit each other with. I then mop up the lietenants and stragglers with single Target dmg containment attacks and or a lightning storm. My seeds should be almost off cool down by then and I start making my way to the next pack.