Game is fun, but the levels are too OP for single player. Unless you like the idea of "story for 5 minutes, grind for an hour, story for 5, grind for an hour, etc." Even if you can handle the mobs, forget about fighting the boss, unless you want to hear the same thing a dozen times in a row.
Other than the level/story-on-pause problem, I'm enjoying it. Guardian speaks, familiar faces from D1 are back. And for all the players that want to new enemies and complain about reskins, there's at least 2 new enemies in the game, and there has been yet an official peaceful ending to the fallen chapter of Destiny. This expansion seems promising in ending that.
Overall, could be much better in the leveling department (not so OP bosses perhaps), but the story, from what I can put together, is quite enjoyable.