I was disappointed with the civil war altogether. Not just the ending. I thought there would be more story to it, but it was basically just: Go capture this fort, now this one, and this one. Ok now take the city. There just wasn't much to it.
Yeah, I normally ignore the faction thing and just go for general side quests mixed with main quest, but I figured I go with the the legion on this play through, I was at level 50 when I joined them and I'd already defeated Alduin, in the whole civil war thing there was no real strategy, go here, kill everything in the fort, report back, the only small interesting part was catching up with the courier, took me like 5 minutes, courier attacks, switch to finisher, my characters sword passing through the couriers chest and done! (I could not use pick pocket as I had not invested in any perks for it).
But, before anyone calls me a hater, I'm over 200 hours on this character and still loving the game world, it's just the story and strategy that need redoing.