User blog comment:Negiiz/What DLC would you like for Skyrim?/@comment-84.83.252.199-20120424180334

They should do something more with conjuration, for example:

you should be able to posses creatures with demons after you've captured their souls, and if you kill a daedra creature, you should be able to fill their body with souls from soul gems from your previous victims.

and you should be able to summon aedra / gaia creatures as well, such as bears, spriggans and maybe friendly dragons.