You are absolutely right. Which is why I'm so excited about Angular2. It's the first post-React client-side framework to come along. (as opposed to React which is more of a library than a framework, although it definitely pushes the boundaries of that...)
Technically you're right - it is post-React. But in order for it to really have learned from React I think we'd have to wait a little while longer, because the industry is still learning what React and Flux can really bring to the table. For me, one of those things is simplicity, and that's something that I feel Angular sorely lacks.
Given the choice between two solutions capable of helping you solve a problem, why would you ever choose a framework over a library? I would never choose a framework when a library suffices.
It's not really a post-React framework though, it has been designed at the same time as React was starting to take mind share so it's not clear if they have built something that responds to what React + Flux provide.
