LE Idea for dawnguard questline

[Badaxe43]

When playing the dawnguard questline, I found it s a shame to kill all the dawnguard NPC or the volkihar vampire NPC

 

So my idea is to modify the quest to make the NPC on each side to make a ceasefire like imperial and stormcloak during the mainquest

And at the end of the dawnguard questline you can get both the dawnguard castle and the volkihar castle as home

I found this idea because I have downloaded Some mod for NPC improvement