I loved everything about this year's Ween event... only suggestions I would make, in order of importance:
You know how the walking npc's turn and run from baddies? It would be very cool if once in the baddie costume, the npc's ran in the same manner, instead of waving hello.
Since TONS of cool large insps are given as treats, it would be fair to TAKE a random insp with trick (that would even things out, and cause folks to think about what to use/store).
Lastly, salvage drops should be scaled down some.. I think I saw some complaining that costume salvage dropped too seldom, but as I write this, each item is available for only 30K on Pinnacle.