As for the Origin characters, sure, you know more about them than other characters off the bat, but you guys saw that you can kill them right?
Swen in one play through to the media showed how the vampire literally drank Shadowheart dry. Dead, gone.
There will undoubtedly be other characters to recruit with interesting stories, quest and romance options that come later on and will not be origin characters, which are just there to give people something to choose should their own imagination not want to stretch to custom characters.
As long as custom characters have potential story arcs based upon race, profession etc... then I’m totally ok with this. And yeah, it’s a damn shame that my custom names won’t be spoken by the NPC’s in game, but you know... ;-p