If you look beyond the server issues that resulted in review bombing on day 1, this is likely the best expansion to date especially given now that the server issues have subsided.
The map is surprisingly large, diverse with compelling level design with light dungeon mechanics - 10/10
The story while a bit slow to start really picks up - 9/10
The new prismatic subclass will allow for more build diversity at a fundamental level - 10/10
The new weapons and armor appear to be overall innovative and effective additions to the sandbox - 10/10
The new content on offer makes this a worthwhile offering for seasoned veterans, casuals and new lights alike: new campaign, new map, new activities, new episodic structure with a more promising content release schedule, some new progression structures, new supers, new hybrid subclass, new transcendence gameplay mechanic, and new raid (tbd).