I agree with your annoyance with the UI libaries. It's been a PITA just to find a working datepicker. We eventually rolled our own starting with the source of an abandoned date picker project. Haha.
Source code here: https://github.com/ng-bootstrap/ng-bootstrap/tree/master/src...
Be aware, it is not perfect atm, especially around validation, but it is pretty much the only datepicker out there for ng2 in the open source world (not even Angular Material 2 has one).
I know it's supposed to be faster - I just am not finding people using this stuff in production seriously until now.
I don't want to clog up the angular group with these informal lines of questioning - obviously.
My favorite thing about ng2 components over ng1 would be the annotations. One annotation turns my component into a component. It links the html template, sets up the services, injects the other components and directives it needs in one simple annotation. In ng1, I remember it being cumbersome to set everything up.
To use a component in your existing app. You create a new ts file. Add an annotation. Write the template inline or in another file. Reference that ts class in your other components. That's it!
It basically uses the JQuery date picker and works quite well.