I agree with most of your guy's arguments, so here I go-
As @ToastedSarnie said, I would love for Sunflower to get buffs in terms of defense. I love how powerful her bloom upgrade is, but I also know that sometimes it can be unfair so I guess I would be okay if they weakened her healing abilities. I just hope that these changes will go hand in hand with giving more XP for healing. Especially for Scientist.
Scientist is my zombie main (coming up on grandmaster soon, hopefully.) I love being a team healer, but I also love scientist's playstyle- it seems focused on strategy and not brawn, I LOVE a good strategy game. The problem is, I also love sunflower, but as so many others stated, when she's alone, it's very hard to win a 1v1 fight unless you're stocked up on sunny side up. So most of the time I assign myself to healing, but this takes up most of my time in the match and I end up getting trampled anyway.
As I said earlier, I would love more XP for healing because of Scientist. His healing sometimes just isn't as effective as Sunflower's, so it's been hard to level him up enough.
My main hope is just more XP for healing, and capable defense for Sunflower. 🙂