I don't agree with all of them, but you did say they were your opinions, so that's fair enough.
I would say that Seedling's ability shouldn't allow it to transform into a plant that costs more than 5, instead of 6.
Grapes of Wrath could maybe only deal 4 damage upon death
Wingnut could use a little nerf IMO
I can't account for Zombies, as I rarely choose to play against them.
