The release notes are even longer than they look because they pass some work to the developer diaries, notably the seven-part series on skirmishes. You may also want to review or print the five-page known issues list, which is noted as being not all-inclusive.
Update: in the spirit of The Lord of the Rings Online™ (although not perhaps Tolkien), something for you to watch while you download. There are two similar videos. HT to Woot.