The Food & Wine Festival is much, much more than just the food booths around World Showcase, however it takes significant planning to really enjoy all that the Festival has to offer.
There are many "hard-ticket" events during the Festival. Everything from special seminars, tastings, Siganture Dinner series, Party for the Senses (a fantastic event ...). They usually go on sale some time in July, and for certain events, sell out in a matter of minutes, so there's no way you can do those as last-minute things. Many of the seminars now require a 'reservation' and ticket to be able to attend. The charge is nominal, but this was put in place to control supply and demand, and, in theory, to boost the 'quality' of the events. Again, this will require significant planning.
If you want to 'wing it', you can still enjoy the Festival. You can just 'graze' as you like by going booth-to-booth and getting what appeals to you. My key advice at this point is to avoid the weekends. It has become a very popular event for locals / Passholders, and the weekends have gotten a bit out of control. I've not really been bothered by people over-indulging, but the crowds to get to be a bit overwhelming. Same for Party for the Senses. I started attending the Party many, many years ago, and it was a "can't miss" event for me each year. As it got more and more popular, it got to the point where I feel is was / is over-sold, and too crowded, forcing you to purchase the premium "wine view lounge" tickets at a premium over what is already quite expensive. (Now I do my Festival trip on a Monday through Friday). Still, if you must do a Food & Wine 'event' on the weekend, I'd suggest trying the Party for the Senses at least once (they are on Saturday nights). The Regional Lunches are great too - I don't know if there will be weekend offerings of those this year or not.
So, keep an eye out for the Festival Guide that will come out just prior to the events going on sale - if you snooze, you will miss the prime events ...