Quests for Daedra Princes
I think it's time that Bethesda reworked the daedric quests. Going to a shrine is cool and all, but I want something new and unique. Let's say, the government in Skyrim has decided to eradicate the public worship of certain Daedra (assuming the next game is in Skyrim). Skyrim's guards scour the wilderness for shrines to the blacklisted Daedra and destroy the idols. No longer will the hero be able to simply make an offering to a shrine. Now you will have to preform some kind of ceremony in private. Maybe you will have to summon a messenger of the certain Daedra. For example, to contact Mephala, one would have to preform a murder in a certain way and then begin any ceremonial rites/incantations. Upon completion of the ritual, you would gain audience with the prince you wish to summon. The only way to find out how to preform these rituals would be through obscure texts (often made illegal by the government) or speaking to a secretive cult member.
When inquiring to people about how to summon a Daedra, if they do not like you or despise Daedra worship, they may report you to the guards. Moral of the story, not everyone can be trusted. Only ask someone who you have good disposition with, or somehow you know them to be a follower of said Daedra.
I am not sure what Daedric Princes (if any) are worshiped openly by Nords, but if there were any, the shrines associated with them would most likely be the only ones untouched, thus letting the hero summon them in a similar way as ESIV.