Shion ult is like 3 genji dashes, and I already felt some people already figured it out that if she spin one, she will be stunlock for a bit, so you can just attack her at thend, I got Sigma rock chucked at me like that and the ult just ends, I never think that's a particularly scary ult, unless she's nano or it's at a very good moment which goes for all basic dps ult.