I like more content for/ with Wyll and Karlach, who both got the least amount of content of all origin companions.
I really would love an Avernus DLC, where you can go with those two to deal with Mizora ( and this time give Wyll some agency) and find a solution for Karlachs heart.
I think the rest of the companions have enough content as is, but Will and Karlach are the unloved step children, especially Wyll, who is the most barebone and doesn't even have an agenda in his own story.
