I like the concept of Showing the two kids in the future, and the idea of showing how cobra kai's style of karate could be used properly is a neat idea.
The only thing I really dislike is how overly douchy they made daniel, as its just a bit too drastic of a change IMO. Making him clueless and corporate minded is fine, but him telling people he kicked johnny's ass and the "I kicked him in the face!" line is excessive.
I do hope they manage to avoid being a bit even handed in examining Johnny's philosophy here-- While I agree that violence as a response to certain types of individuals IS a proper response, I hope they don't go overglorifying it (I'm reminded of the "Assholes, pussies and dicks" speech from team america).
Mister miyagi wasn't opposed to violence when pressed after all, but he made a point of not REVELING in it specifically or taking satisfaction in hurting others, which I think was a good lesson.