Do something about berry decks
Berry decks are really ruining the game for me. Not really because they're overpowered, though they are a bit, but because they are far too common. Mostly they are common because they're overpowered. But it's far worse that somewhere between 1/3 and 1/2 of the battles I fight are against berry decks. I play almost strictly zombie, and it's fairly annoying and boring to go up against the same decks almost every time. There are a couple other really common ones, but berries definitely are the most common. When I do play as plants, I play against a different type of zombie deck almost every single time. I also have about 20 different themed zombie decks which I rotate through regularly, because they're all fun and mostly effective.
There are definitely other plant decks that can win, but obviously there's a reason why people stick with a few of them. Berries are just way too consistent against most decks, even decks built around anti-berry cards. Yes, they're beatable, but drop most of my decks that usually win ~75% of the time to ~40-50%. And it's not good for the game to feel like you need to play one particular type of deck to counter the berries, because then the plant players have to deal with the same boring deck over and over. Making other types of plant themes more interesting would be best, but berries could really use a little nerf, if only to push players into some of the other pretty powerful plant combos. It also might help fix the discrepancy between how many plant players and how many zombie players there are (unless the 30 second wait vs. 3 second wait is about something else).