I do not have answers to your questions and am wondering if anyone else does. I saw you posted a thread earlier that did not get a response:
There may be some related answers in this thread:
There have been a few other angular-like threads that have not had answers either, so I'm thinking there isn't much luck.
Here is a GitHub link I found:
- and - Angular Esri Map
I hope this is somewhat helpful and that maybe someone else has something they can add.