MVC is perfect for User Interface applications. Why this is NOT MVC is surprising. Also I was expecting a lot of new web technologies in a framework that was introduced in 2015. Web Components?
MVC typically relies on an event model which is difficult with larger applications structured across many developers. If you look at some of the reasoning behind Flux/React this is pretty effectively outlined.
OO and MVC aren't the end all, be all of application design.
