Insted we could experience real quests, like in Oblivion. I remember doing a quest in someone's dream which was quite cool. Also there is this one quest in one of the castles where you enter a painting and a new realm(brush of death?). Also there is the Sanguine quest which is awsome and the "Unexpected Voyage" quest etc. Oblivion quests felt more special and fun, much unlike the Skyrim quests which is starting to get boring in my opinion. Oblivion had a lot of flaws, but at least i remember i really enjoyd doing the quests, even tho boss figths were to easy.

nevertheless i agree partially with you,certainly the radiant quests needs a heavy refinement.
so I guess there is still quest to discover, but still I think it would be better with less radiant quests and more unike quests