https://www.gamespot.com/reviews/destiny-2-warmind-review-back-to-work/1900-6416908/

However, if you aren't already dedicated to reaching the level cap and completing every late-game activity, Warmind doesn't offer many draws for you; the only reason to do anything is to level up or get new loot, and that can keep you busy for a while this time around. How busy depends on your patience when grinding and your desire to jump through every hoop to get there. That barren middle-tier--when you've beaten the story and need to grind 20 or 30 power levels so you can reach the endgame--is a very easy place to lose steam.