I'm very early in the game still, but when I see a two day item is needed, or a 12 hour scout, I start it early so that it finishes when I need it to. In theory I think you could do this even with a seventy hour quest. Make a plan, look at the upcoming quests and start those scouts three days early.
Different players have different needs, so maybe the rewards are not great for your city, but I'm very excited about the day set. It's possible that Inno doesn't do a great job of supporting the playstyle that you've chosen, but that doesn't mean they aren't taking the events seriously.
I don't want to sound like a know it all, I'm a total noob just starting dwarves. So maybe it is going to get much harder for me soon and I'll have to eat my words. For me it is a mystery when players with four times my score can't finish these events. (literally a mystery, no judgement I just don't know how that can be. I finished yesterday)