All in all, Evangelion: 3.0+1.0: Thrice Upon A Time is an excellent mix of new and old. It uses the same building blocks from decades before to create a new story with a more hopeful message. Characters are explored in interesting, dynamic ways and the film ties up the vast majority of loose ends that the previous films have left hanging. And while it does have some weaknesses in its world-building, you're likely to be so caught up in the adventure that you barely notice your first time through, or are willing to overlook them in the face of everything else it does well.
Thrice Upon a Time bills itself as not only the end of the Rebuild of Evangelion tetralogy but the end of the entire Evangelion franchise. And, if nothing else, it certainly delivers a satisfying conclusion.