What are our thoughts on astra yao?

As a miyabi main, I saved a lot for her banner and was able to get c4r1. I lost my last 50/50 so am basically deciding whether to go for the c5 before her banner ends or wait and get guaranteed astra yao.

I get this feeling that survivability does not seem to be a huge benefit in this game. The difficult content seems to 1-2 shot you. As someone with Ceasar, playing in high level tower, her shield will just get one shotted. I feel like the game may emphasise much more on damage buffing/ enemy debuffing synergies rather than heals and shields.

Astra seems like a bit of a bait, and they hit us with strong synergies afterwards. For any HSR players here, I'm not sure if astra will be the next luocha, or the next ruan mei.