As I know little about this dlc I've got a question to ask. Do you see much in the way of classic "Oblivion" style Daedra architecture in Dragonborn?

No,obviously,you see dunmer Architecture...lol

No, there's none.
The new ruins/dungeons are the same you see in Skyrim.

In Morrowind, there were no Daedric ruins on Solsthiem. But the daedric ruins on the mainland were very unique, and Bethesda would have had to make them from scratch if they wanted to add any to this DLC (since there are none in Skyrim to begin with)

I think you missed the point of the question.