Hmmm idk what is in a regular Crafty Crate so I'll make a few guesses amd what I think would be cool.
For fall maybe a chicken egg renamed turkey for fall/thanksgiving, but if your not from the States that doesn't make a whole lot of sense...... plus Eula and all...
But here is a few fun things:

1. Some banners, such as those at spawn or any. Banners have a set limit for how many times they can be dyed so some special banners with awesome designs available only through commands is neat.
2. What about some skulls? You can find an awesome collection of skulls at

http://heads.freshcoal.com/maincollection.php

Everything from pokemon to food to batman. A magikarp skull or something else like that would be cool.

1. What about a stick or a brick or something like that with a special lore? That could be epic.
2. Fireworks? Maybe an awesome fireworks set? Idk if that breaks Eula.
3. Maybe like some sort of potion where when you throw it down it gives off an effect cloud. Im kinda reaching on that one though. To much work for 5 seconds of fun.
4. Any way to get armor stands with arms down into some sort of spawn egg? That could be fun.

I'll brain storm some more.