You mean outside of the fact that you technically killed Oryx on the Dreadnought and yet the Taken are still apparently keeping up their conquest despite that, along with an "Echo of Oryx" which is given no actual explanation or even any real reaction to by the Vanguard? Nevermind that those same quests yet again stretch out the Year 1 content by having you replay through old areas. I did the Taken War Questline, it was short, repetitive and just a giant pain in the ass that only served the purpose of providing you with an extra challenge. Like I said, its comparable to the Riddler Challenges from Arkham Knight but that aren't really important to the main story. At best, you could say they count as Side Quests which is what the majority of the quests are, but they are handled in such a way that, for me and others, failed to draw us in and actually make us WANT to do them. And even then, the Taken War itself took like 2 hours playing it solo. If I would've had help with it I'm sure that would have amounted to a much shorter time.