Curse Of Osiris>Lightfall
"Give me back my ghost you ahole!!!"-Bad -blam!- Osiris , in not so many words
"I don't sound like Shaxx,Shaxx Sounds Like Me"-Bad -blam!- Osiris
Compare that to anything Nimbus said
Please no.
Curse of Osiris was a bottom of the barrel no effort story.
Lightfall was the narrative team desperately trying to squeeze in a decent story with little time after the studio decided they needed another expansion before the end of this saga. They failed obviously.
We had actual villains this time around, but funnily enough at least CoO was clear about the consequences for the Vex succeeding.
TL:DR: CoO was worse than Lightfall, but there’s still lessons that could be taken from it.