i think it comes down to alot of players getting really used to playing rose as main, and not being able to mentally switch back to playing smart, since they have been able to just steamroll any zombie.
I feel the problem isn't the Plant's DPS, but their survivability or should I say lack of. It's evident the most in Herbal Assault, they may get in there but they sure don't last long when they do.
I enjoy playing as the Sunflower, but when a Scientist warps in on you it's game over and a fight you can't win. You may have equal DPS, but you will be dead before you use it at close range. I don't know why, but even when the odds are against you I still find the Sunflower as the most rewarding class for me to play as.
