Can you do something about Soraka's survival?

 I have not been in a game where I thought that me dying would actually benefit the team if it meant healing someone else. However, in such a snowbally meta, this is a huge problem. Sure, I can W my ADC before I die and give them Ardent Censor. I understand you want to up damage a lot and I understand she fits in well by taking 10% of her HP every W but really? Is her penalty even necessary anymore considering you wont give her any damage? Once someone builds MR, her Q and E just become utility. Once someone builds GW, she just hurts herself more. (Meaning the tradeoff is lesser but not bad) If you build Warmogs, you can't go aggressive and her Q becomes a double edge sword. She only has one 'reliable' (lul) attack against the rift herald. She can't farm well at all. Her E does no damage to anything but champions. Her W and Ult only target allies. (for obvious reasons) If nobody is taking damage, she really doesn't give much to the team except utility, peel, and CC. A decent enemy will dive you and you will be dead in seconds. She is all about 'fast paced decision making action' now and one mistake means certain death.

Now I understand she is a healer. I understand her winrate right now is decent. However, with as many drawbacks as she has, is it really necessary to make her hurt herself anymore? Once you are stuck with a bad team, that hurts you even more since it's basically the only way she carries now. In fact, I might argue she does worse against AP tanks. (Which is predominantly most of them) If someone decides to build and , you are basically perma grievous wounded.

Is there something I am missing that makes it still necessary to make her damage herself?

Update: I forgot to add she has absolutely no mobility until an ally is damaged, which in turn, may make you actually not want to heal them until you pass them. Kinda defeats the purpose of her W.