A dumb idea: how could Soraka be changed?

So Soraka as you all know is the primary healing support and banana enthusiast. She's also been a big subject of balance issues over the course of her existence (but let's be real, who hasn't?). Now granted there are a lot of reasons for this that I'm not going into because I'm a bit of a lazy bastard. There's only one thing about her that I want to talk about.

Soraka's heals are too reliable, which makes them overbearing when they are good.

Her healing is basically point and click. Yes it costs her a % of her health, but she has ways to regain that (star fall hp regen or going tank Soraka for Warmogs). Hell, her ult is probably the most reliable ult in the game and the biggest middle finger to Karthus (Soraka plsss!).

Because of this, her heals aren't really allowed to be good. Even with GW being an easy thing to get (but ADCs won't buy it because it sets their damage back) her heals can't be too good or else she'd be the perfect support for weak laners.

So what would you change?

I'm glad you asked, voice in my head!

Personally, I would make Soraka's healing either delayed or more telegraphed and possibly turn it into an AoE heal. Not like Taric's weakass heal (cause he's not designed to only heal you) that requires a bunch of charges to be ok. I'm more imagining something like a friendly starfall. Where allies inside the radius of the ability are healed for a good amount. Granted this wouldn't make it harder to heal under tower, but it does provide some counterplay to her healing rather than just counter building (since you could knock them away from the zone).

Then we have her ult. That global instant heal. Personally I think it needs to go and replaced with something a bit more...fun imo.

Heroes never die!

Martyr: Soraka uses her remaining life to revive X teammates.

You can't just bring Mercy's ult from Overwatch into a game like League since the pacing is much different. Since we already have an easier revive from Zilean, I thought it would be interesting to allow Soraka to revive multiple teammates in a teamfight at the cost of her own life. The ultimate sacrifice so to speak.

Obviously the idea is a bit flimsy and might need ways to determine when is best for Soraka to do this (like a low health Soraka won't revive people for a lot of health) but I think it'd be interesting to see.

Thoughts?