The duration (4hrs) is not so much the issue as is the expiration. For me personally, 4 hours is too long however I'm not asking for it to be shortened as there are plenty of guardians that can stay online for the full 4 hours. But for me, finding 4 hours that I can fully dedicate to Destiny 2 is hard to come by. My issue is that if you pop the XP boost and then sign off while it's active and don't sign back in before the 4 hours is up, you lose it. Why does it not pause instead and resume when you get back? I feel that it should pause because if you aren't logged into the server and actively playing, then how are you using the boost? I only had one XP boost to play with, logged off when it said I still had an hour and 42 minutes left. But when I signed back in roughly 3 hours later, it was gone. So I'm assuming that's by design unless it was a bug. Basically, I think all XP/Loot/etc.. boosts should pause if you log off.