What is the point of these things? A "newb" tax? 3 Energy for a couple treasure boxes that rarely even have 30 crowns (if they're not full of a tiny bit of heat or a sleep vial or something) is such a ripoff it's disgusting to see one show up in a zone, and know that but for random chance you could have gotten those boxes for free.
Seriously, if this was supposed to be a gamble it would be fine. If sometimes the boxes had crap in them and sometimes they had gold coins, it would be great. But they're always terrible. Always. Even on the deeper floors, you'll be lucky if you get your money back CUMULATIVELY (meaning if everyone in the party gave the crowns they got to the person who payed the fee).
And this was true back when energy was ~4000. Now at 6k it's even worse.
Please make these doors worth the risk at least half the time! (and while you're at it: treasure vaults need love too)
Edit:
And another thing... those robots that cost 5 Energy to activate?
Lol.
Agreed. Mech Knight and Treasure Room energy charges are basically idiot tax.