Too long. Bullet points would serve.
I'll tell you why.
Poor voice acting.
No backstory. Saying the fallen are crawling on the city is not a backstory. No reason what the nexus is trying to do.
The above point is all in grimoire. Which should just be extra details about everything.
We don't know what we achieved. We killed Sepiks. We stopped fallen where we actually are driving them to be extinct (house of Devils) since we killed their prime. And we don't even know how important primes are if not for grimoire.
What happened to the queen? Grimoire. No engagement for feels. Even though I don't like her.
Most important point. Typical mmo story where you're a soldier no different than your kin then suddenly you're the hero of the world. This kills it.
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It's only as long as necessary to get the point across. Of which covered your points in the first few sentences. So you know.