Only thing about her I would change is her hitbox. Shes very smol, very fast, and very slippery. Her heals are underwhelming as far as strict heal support goes, shes more of a cc champ than anything. Playing a gunner against her is useless because her small size and huge speed makes her an unpredictable target.
Instead, let the melee or other cc heros take care of her. Rath eats her alive, Montana’s knockup or slow greatly hinders her escape potential, and benedict’s aoe + lock on is a no brainer. Oscar, Whiskey, Marquise, Caldarius, etc all are suseptable to inaccuracy with no real counterplay save for marquise’s slow and maybe caldarius’ blind.
If she builds CC gear, she loses out on something like heal power, healing recieved, attack speed, cdr, or damage reduction. She has negligable damage, heals that require offensive action, and nearly no survivability save for her slippery nature. Her self heals are laughable, her teammates heals come few and far between if she wants max osmosis stacks, otherwise she is hardly a healer and more of an initiator/CC dispenser.
She isn’t broken. She’s been out for less than 24 hours. Just because you suck against her doesn’t make her OP. You just need to learn the matchup and coordinate with your team better. She drops to a Ghalt in less than 2 clips which is easy to get off with spread helix, hooks, and traps. Just get good and play the game to learn how to beat her instead of whining on the internet like an entitled baby.