The part up to Zero Hour is fine. Bungie however is starting to rely too heavily on timers and wipe mechanics as a source of difficulty. The occasional use of timers is fine. But we're at a point in Destiny 2, where the vast majority of content is being timed as a means of making it "challenging". As True Vanguard was rumored to have said, "A musical note...one note....can be the most beautiful sound in the world. But if you repeat that note over, and over, and over again with no change or no variety. You're eventually going to get the point where you get tired of it, and the sound becomes annoying." Bungie has reached that point with their use of timers.