User blog comment:SirAston/Flow - A new mechanic, a missed opportunity imo/@comment-5781707-20140205062708/@comment-24087642-20140205065252

Let's not forget that Yasuo doesn't have just one passive. So while flow isn't as good as blood well, flow + 2x crit hit chance is about equal.

I might be the only person in this entire wiki, but I like his passive.