I loved Graduation Day (both parts). I can understand being a little disappointed with the battle and special effects, but as far as the story and everything went I thought it was fantastic. And I loved the way the final goodbye between Angel and Buffy was handled.
You'll learn the answers to most of those things you wanted to see wrapped up, but one thing you've probably already learned about Buffy is sometimes you have to be patient for while before they get back to stuff.
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I made a living on time trial blowing myself off to cross the finish line at ludicrous speed. -transience