The goblin seems quite voodoo, especially with the ending art in the video. I suspect the dragonborn isn't overt evil, but was dominated. But that's just me.
Isn't that just Lohse though at that point? Good character sporadically possessed by evil murdering entity?
Wyll and (possibly according to datamines)
already have 'passengers'. That's not even counting the worm that all origins have. We are looking at eight party members (all origins plus Minthara) who have the latter affliction. Do half the origins really need to have another voice talking in their head as their gimmick?