Since the NDA was lifted, Helm's Deep Beta Players have been posting information galore. Not only have they created Player-Made Class Guides, but now they have also created Player-Made Class Videos, that show how the Class Changes work. A number of them are posted on the Lotroplayers website. Some are posted on the Lotro forums. If you are interested in seeing how your class changes work before the update, then these are the places to go.