Can we get a Treasure Vault fix here? I mean... gee, it's not really worth it.... Here's my suggestion.
Chests: All money... I'm sorry but that should be self evident.
Crystals: Only around the elevator.
Tier 1: Leave the level as is.
Tier 2: Indiana Jones type of puzzle cave.
Tier 3: Vanaduke Treasure Safe: Bomb walls and fight guards for a big reward.
Yes, I know I'm suggesting work... but I wouldn't do it if I didn't have faith in you.
It would be too difficult to program only crowns boxes for one room. Plus, some people need heat.
Crystals only around the elevator? How does this help the game or benefit the players?
You do realize that Treasure Vault is a depth to relax, right? It's significant because it's the only place in the Clockworks that's peaceful. It even says this at the beginning:
Relax! Smell the flowers. Enjoy your day in the sun. You earned it!