This was my second year volunteering at CG. I attended on Saturday and volunteered on Sunday. I agree with everyone who has said that the signage needed to be much better. I thought the waits were worse by a bit on Sunday, but did not think they were out of line (heyohh). Whereas waits fluctuated on Saturday, occasionally dropping off but mostly staying sizable, they were consistently long on Sunday. I also think they should keep their methods consistent--either make me wait in line for each vendor or one line for the whole tent--otherwise it's like the Sophie's Choice of food. It was hilarious that one of the consistently enormous lines was the Stella/Leffe/Hoegaarden tent, which I'm sure was due to the free glasses they had. Whether you paid $90 or $150, I would think that glass wouldn't be worth a half hour of your time, but swag is swag I guess. Point is, they should be able to anticipate where the biggest lines are and adjust accordingly.
I don't think they need to add more food or space, I really think they just need to reorganize things in a more efficient way and maybe cut down a smidge on attendance. Groupon lends some diversity to the attendees (mostly in age, style, income bracket and foodie-ness) and I think that's a good thing, though I don't think it should be at the expense of full-paying attendees or put them over capacity. So either cut down on the full price tickets you sell (that seems unlikely) or cut down on the reduced price tickets you release. As to the bag checks, I didn't see that on either day (and on Sunday was posted at an exit), but that's absurd and wrong.
Maybe it's just rosy retrospection, but I thought last years food was better. I did appreciate the addition of the specialty food vendors tent but wish it was not physically separated from the main grounds. I took some pics but because of the poor signage and self-imposed pressure to move quickly to the next destination, didn't get most of the details.

One of my favorites from Saturday, from Lockwood (obvi). The bun was perfect.

I thought the desserts for the most part were fantastic. Mini-macaron on the bottom.

Fried mochi w/ unagi mentioned upthread. I liked the beef, but I may have just been entranced with the flavor injection. I was disappointed by the Asian tent overall.

This scallop was really nicely cooked, not too busy, one of my favorites. From the Supreme Seafood tent--anybody remember who made this?

Butternut squash soup w/ Laughing Bird shrimp. I liked most of the soups and thought they were a great break from the meatmeatmeat everywhere else. I noticed an obvious shift from pork (and pork belly) last year to beef this year. Not that I'm complainin', just sayin'.

I just had to include this dud. Berkshire pork tenderloin with parsley bread crumbs and crispy capers. I've forgotten who made it but it was from the Allen Bros. tent, 2nd shift. I remember thinking, 'I hope that tastes better than it looks'. It didn't.
It would be nice if you were able to buy entrance for the food, the drinks, or both depending on your interests and budget. Maybe different color wristbands and separate the sections? I don't know if it's logistically possible, but it's a thought.
"People sometimes attribute quotes to the wrong person"--Mark Twain