Oh jesus. This QQ thread and those people who spams those list nerfs seriously should stop complain this game and train  to get good.
First
The game is not THAT unbalanced.
Second
Why do you ask nerf for Imps when he was clearly unplayable last patch? He need a change not a nerf. He need to trade some HP in favor of more damage. To be honest is not even Op , is just annoying because he forces you to pick something you don't want, " oh you can't play your beloved Corn, what a wrong crime for the human rights" now i understand this sentence. Imp is extremely easy when enemy team is full of Corns, maybe only BBQ can deal with him , but still.. why do you think just making him a little bit tankier when he was clearly too squishy made him to op? Is Op by himself or something changed in the meta make him more affordable to play? And besides that, Regular Imp is pretty balanced and shrimp too kinda, what are Op are just Z11, Lil Drake and Cone. But Z11 and Cone were nothing special before the health buff because they take advatnage of the frontline to deal their damage.
Also this class is not a sniper, has a huge damage drop off on range, and has not high damage XD has decent damage, the damage were nerfed to the Beta, the Kernel Corn hp buff and those Citrons are really hard to deal because they are pretty bulky, lol, and the regular has also a huge bullets dispersion. This class is still the squishier frontliner in the entire game, and if you can't deal with him, it's pretty much your fault, because there are plenty of plants classes that can deal with them. First, you garden lovers.. or should i say KINDERGARTEN lovers, DON'T BOTHER YOU PLAY THOSE CLASSES BEFORE COMPLAIN?
Every fire class zone them pretty much from the frontline.
BBQ Corn has low recoil
Other counters: Pietryfied Cactus, Jade and Zen if you aim correctly with the splash damage.
Blast Radius PeaShooter, especially Rock and Toxic. Rock forces him to reload, also his Hyper is way better than his doublejump 🙂
Regular Citron counters him perfectly, too bulky force him to reload, and his splash damage infinite beam weapon is perfect to deal with them.
Spray Chompers, but Chompers generally speaking. Too bulky force them to reload and can bite them to the death. 
Roses are just good to with them thanks to Splash Damage and Enigma
Nerfing Imp to a point he will become even weaker before the buff is same has happened to Rose. WAKE UP YOUR MINDS, YOU KIDDIES and seriously get good.
Third
The actual Rose isn't that bad, just extremely hard to play, and still is even better than all the Corn's variations (besides BBQ)
I have 2.00 KDA with regular Rose. i played her only post patch and still can't fkn reach more than 1.5KD with any Corn variations, no matter how much play them.
Fourth
They already said they are going to buff Citron next patch.
With Citron and Rose little buffs, are nerfs to Electro Brainz and Sharkbite and Imp, Plants will snowball.
Imps will have HP reduced with those primary coutners buffed and spammed (Rose and Citron) and they will be all unplayable again 🙂
Just to clarify Imp is my favorite Zombie class, but i have them all to Master so don't really care if they will ending up to do the same fate of the Rose. But still, why after the Rose accident you want every character to be unplayable? Same happened to Zen Cactus. Then we have to spam QQ for days for every single class?
Also what the * o_O who said Scuba Soldier op.
Ok this is the clair proof plants lose a little bit more, but you pretend that every single good variations of zombie class to be broken. Zombies are just stronger because some op things, but you get the illusion every single things that kill you is Op, i listened someone blame some engineers class like Roadie Z or Electricist and Welder.. are you serious???
With Rose and Citron ups you will not see anymore Turbo Twist spammed. This is way game will be magical balaned, because Rose alone counters both Imps and S.Brainz. the two stronger classes in zombie side.
Fifth
Plants aren't underpowered. Most of them just require coordination and skill, something in a game with no chat text and no MMR matchmaking is a huge handicap, but to be honest i think Plants in a coordinated context are way superior (maybe besides Cactus - Pirate). And they are because they have tools to deal with everything. Zombies have just a bunch amount of damage skills. Still Roses and Citron have their AoE CC, something the zombie team lacks, and Engineer stun grenade is not even close as both of them.