I'm a big fan of the food booths.... I only wish there were 1 or 2 more to be honest!
However, an aspect of flower and garden that I think could be beneficial would be 'show gardens' similar to what you get at Chelsea Flower Show here in London - gardens set up to look at and give inspiration. Maybe two or three in Future World - with modern elements such as irrigation systems, modern lighting/design and new ways of incorporating fruit/veg (an extension of The Land if you will, but in a show garden concept) whilst in World Showcase more of a larger garden display of world inspiration that changes each year - several gardens set up themed to countries that aren't in world showcase.... An Indian garden, a Greek garden, an Hawaiian garden - something that's not just character topiaries and gardener a/designers could be on hand to give tips.