proposal of a new type of solar beam

Are you proposing, when they're in a group battle:

1. if the beam hit your teammate,  it will heal them

2. if hit zombie, it will damage the zombie

That sounds cool, but the healing and damage needs to be less (-50%) to compensate this advantage. 

Imagine, we've a team of remote healer, the job is to heal from a distance, then the zombie will go nuts since it becomes very hard to kill the plants, even just one....send the armor chomper or HOT iron citron and take the turf, let him have zombie feast by himself.

I strongly disagree with the idea of her having a healing solar beam, majorly because of both player abuse and ability characterization.  As asukokjo pointed out, you could heal teammates, but because of it being a beam, I could see sunflowers currently hiding behind rocks or hard to reach areas and spamming their teammates with this, while everyone on the other side is scrambling to either take her out or focus fire on the targeted plant member(s).  Secondarily if it causes damage, enemy players would have an area of denial created against them, which would allow advancing plant teammates to quickly jump onto the point or protect the gnome bomb with no real restrictions. I am seeing a dark flower/solar heal ability mix-ups happening and just scared thinking of iron citrons or hot rod chompers being way too dangerous in this combo.  In terms of abilities, the sunflower has the beam because she has no secondary damage besides the evil flower with the tradeoff being that you cannot heal yourself now and to be more mobile in combat situations to avoid taking too much damage.  The solar beam is meant for planned strong attacks as it draws attention to your character because of its sounds and color;  it also dishes damage quickly for taking out specific targets like dummy shields, encroaching soldiers, or all-stars.  By altering the beam, she becomes kinda pushed into being only a healer, but with no way to defend herself fiercely outside of her normal form.  Personally, I would rather see a variant for her shots similar to the crusader's crossbow in tf2 in terms of having her more focused on healing, while maintaining the purpose of the other abilities.

Yeah I agree with asukojo that the damage points should be reduced , but still I think of it as an interesting idea.

Sunflower already has 4 special abilities. Other characters have none, or only 1. Some, stupidly, such as the cactus, have 6. Sunflower doesn't need a fifth special ability.