LIFL: World Showcase can be nightmarish if it's extremely hot or extremely crowded. That's why it's great to know about the little hid-away places like the Morocco and Japan art galleries and the Norway Stave Church. Always cool, usually pretty empty, and great places to relax. I'm so glad you guys enjoyed WS this time around; it's definitely one of our favorite places.
Tony: I've always been disappointed in the merchandise around the UK pavilion. They seem to be pandering to an "idea" of the UK, but maybe that's just because I know the actual UK better than I know any of the other countries represented. Perhaps they're all like that. Also, agreed that you could get lost in Morocco. That's such a beautiful pavilion. And I love your description of the Mexico pavilion "taking you by surprise." You really don't expect that huge marketplace inside! As for the food at San Angel, it's not spectacular, but people really like the atmosphere of the restaurant -- that's why it's full 
Personally, one of my favorite spots in the WS is the bonzai garden in Japan. I really like walking through there. I wish they had more places to sit, though.