I guess I could provide you with feedback here instead.
It would be more fun if it was more competitive, and that the guideline bar was higher, it pushes people to find more distinct cosplays rather than just rushing through to complete the categories.
Feedback for rules
1) Disallow photos from a organized photoshoot. It basically giving some of the categories for free, like the popular (if they picked the 7 photo option) and the clones.
2) If you have to even question it, than it should be a no. maybe as presenters, bring some comedy, like a giant Judge Mallet and Scream at the audience of why something is great or bad. (Harley Quinn was not in a batman movie, and Jack Frost IS NOT DISNEY)
3) To encourage uniqueness and bringing up the rare costumes, add a boggle rule of "If someone else got the same cosplayer for the same category, that it shouldn't count"
4) add more funny categories
5) vauge categories are good, but might have a bigger ratio of harder categories.
6) How about a "Caption That" section, where you give a idiotic caption, and they have to find a good picture to match the caption.
7) Additional rule. A single team can not use the same cosplayer in different categories (no one did it this time, but they may in the future)
8) Add bonus points for the judges' favorite in each category
Feedback as a presenter
1) Strip out the names of the files, some of the suprise was given away by the filenames
2) Encourage people by staying through the panel by giving away prizes at the end, not offering them in the beginning so they can leave
3) In the con book, the same description was given for all 3 panels. This is confusing for folks as they think they can join the game on the sunday panels
I've done panels at several cons before, if you want to bounce any ideas, feel free to use me as a sounding board.