Wow, there were spaces on decklists for deck names? That's cool. Was it just a blank to fill in, or were the deck names used for anything special? If it's the latter, is there any reason why you can't just write your deck name in some blank part of the decklist anyway?
Perhaps they would use it if you were to do well in Worlds as the name for your deck if they were to print it as a World Championship deck. I agree, that does sound cool to be able to put your deck name on the form.