Including or not Including the Usual Dhakaan

Okay, so I've been reading the Legacy of Dhakaan novels recently, and it inspired me to look more deeply at the Heirs of Dhakaan. Which has, in turn, gotten me to thinking about whether or not the Dhakaani empire and the heirs are improved by the Ull Dhakaan. Firstly, I find it weakens the imperial collapse narrative if the empire fell because of daelkyr magic, and it makes Darguun look way worse because they're just degraded copies of the old empire without its true unifying force. Also, I think the history of Dhakaan is a lot less interesting if there was not that much internal conflict because the dream smoothed that over, when rebellions are some of the biggest part of the history of Rome and other empires. What I might settle on in my Eberron is that the Uul Dhakaan was a post-collapse practice the Heirs of Dhakaan created to maintain the remnants of the empire in their vaults. But I want to hear from other Eberron fans about what they think.

Edit: I just noticed that in the title Uul Dhakaan was autocorrected to usual Dhakaan. I meant the Dream.