I like most of the internet thought the Riders of Rohan trailer was very cheesy and much pre-production wasn’t put into it. One of the things that you have to keep in mind though is that Turbine isn’t and wasn’t a one-hit wonder company like Blizzard Entertainment was.
With that said, after watching their Behind the Scenes video it made the Riders of Rohan trailer feel much more awesome, especially with only having 6 weeks of pre-production. These guys are really passionate about the game, you can hear it in their voices. From what I gathered they really wanted to put together a good trailer and if you want to compare, this is probably their best expansion trailer yet.
Take a look at their Behind the Scenes video, it’s really informative and really shows the passion these guys have for the game and the story.