Erm, yep. Water is tough, I'll give you that. But I can only agree to some of the points you've given:

The mega healing and debuff cleasing is annoying, but isnt Water supposed to focus on healing? But agree on Healing Tip shouldnt be able to stack.

Poison Tai is damaging, but all 4 stacks of poison only counts as 1 layer of debuffs. If your team has somebody who clears debuffs for the whole team like Hanzo or Gakido than you are pretty golden.

Water has a lower chance of accupuncture/chaos with her standard than what you are describing. It depends on her and yours combo rate.

Can't comment on Earth vs Water growth stat, because I have played Earth only once for exam 140.

Chaos-ing everyone? Again, that a stress, even Shark Bomb which has a crit buff has less chance of crit than Lightning's 2nd standard. It's only her 3rd chase that guarantees a crit hit.

Fire, bless his nerfed and underpowered heart, also has unlimited chance of CC-ing. Sleep and chance of ignite for standard attack, blind, ignite and imprison for chase, (and 2 tags everyturn but that's for a later time) and transfering debuffs. So no, he does not do less cc than Water.

As for Kakashi, agree that even with his breakthrough, he's still severely underpowered, Yes he has a VERY high chance of causing High Float, but his reliance on tag lower his utility. If he starts inflicting Tag when he successfully initiate a combo on somebody with his standard attack... now that's a different story. Also, for somebody who can creat only 1 clone, his clone is indeed Ao-thin.

P.s: Hate to break it to you but Water in the future will be further buffed: chance of healing 2 targets, crit buff instead of attack buff on Reverse seal, Ninjutsu buffing on Sould absorbsion and Tobi-level dodging of mystery which will reduce her Mystery cooldown. But let cross those bridges when we get there.