Emil is too retarded to think of any decent quests or story beats, so here's a decent one I thought of.
Hammerfell needs an opium den skooma den quest line. It would fit so well, and it did happen historically as seen in the Opium Wars.
The Dominion are one of if not the premier naval powers of Tamriel, and they control Elsweyr which produces moon sugar and in turn, skooma. This gives them the means to smuggle massive amounts of skooma into Hammerfell.
Why would they do this? Hammerfell is their sworn enemy. They seceded from the Empire to continue the fight. Getting a large portion of the population hooked on hard drugs would give you a large amount of leverage on them as well as making them far less productive citizens. Societal decay would set in extremely quickly, paving the way for future conquest.
The second reason is that they could twist it to alienate Hammerfell even further. Perhaps the Dominion would embark on a "humanitarian" mission to reduce the skooma trade by searching and seizing all illegal merchandise on ships leaving Hammerfell. It would be bullshit of course, but would the Empire risk reigniting the war over a small province they don't even control just to keep trade flowing? I doubt it.
This story thread could be turned into a quest a number of ways. Maybe you're talking to a guard who refers you to the commander who is holding an investigation on the matter. You follow up on some clues, spot a deal going down, and tail the dealer to the supplier. You go to confront them but before you can you get hit with a mafia style "You'll forget what you say if you know what's good for you". More investigation work and you find out the supplier you uncovered earlier is due to get a shipment at a hidden cove. You follow them over... and spy an Altmer ship crewed by Altmer unloading skooma by the barrel. Return to the commander with the news only to find out he's been assassinated or whatever.
Opium wars mixed with CIA inner city crack dealings with a splash of cold war shenanigans.