Yes but hear me out... no matter what in oblivion Martin sacrifices himself and defeats dagon, morrowind also had one ending but here, you have two Stormcloaks or Imperials so they cant just pick one that would anger a bunch of players
"That damned civil war cost Skyrim a lot. It's still recovering."
"Good thing SOMEBODY kicked their asses into gear and ended it before it got out of hand."
"I was reading a book about the Stormcloak Rebellion the other day, and noticed my great-grandfather was an officer."
"Then he fought for his home, like a true Nord."
It's an easy fix, if you veil major details, and expose minor details. I'm sure most players would be fine if they managed it like the above quotes.