On MMO-Champion front page there is a 'summary' post that covers all the Cata Changes. If you click on each of the instances it opens up a page showing all about them and for each boss a short video of it being done on Beta or by these funny guys who do a blog.

http://www.mmo-champion.com/content/...live-THIS-WEEK!

You can either be a purist and try learn the fights yourself or you can watch the videos. I did a bit of both and TBH I enjoyed trying to execute the video strat well rather than wiping and working it out a number of times.

BRC is very easy vs Throne of Tides. From the sounds of the later dungeons it gets quite a bit more complex and movement based.

Never say it can't be done though! We will conquer everything!