Wow. This was a great trip--I think you managed to see the major attractions, as well as take in the theming, street performers, etc. Sounds to me like you really enjoyed your time, despite a small mishap with your knee. And you don't need to see everything there--I'd take quality over quantity any day!
Seems to me that Uni has as much going on as WDW now. They're really raised the bar down there, and that's pushed WDW to get off their butt and start adding some new things, too. (Of course, WDW isn't exactly noted for speed when adding new attractions; but I've thought that without UNI cranking up the competition over the past few years, goodness knows when WDW would ever add anything new?!
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