150HP heal every 5 second? So…30HPS effectively? That’s exactly what Zen has except his functions through barriers, is constant, and has an ult that makes his team nearly invincible for 6 seconds.
Brigitte really isn’t that great. She can be effective for sure, but she’s not a main healer. She’s not consistent enough being able to burst heal every 5 seconds. Also, having what you consider a significant chunk of her healing as an ult makes her horrible for main healing.