This is not about OPEN LOCK... this is about the DC to break the chests.
Well, one might say they should be the same. But one could also say that mechanism-wise breaking and open lock are different approaches. Let's say there is a chest you need a 20 to open.
Break: expect to stand there with your crowbar for several minutes
Open lock: take-20 opens it within seconds
So i have no trouble with accepting that the open lock DC may be significantly higher - especially since it can be buffed far easier and way more than breaking.
Against identical DCs speaks the intention to always bring a rogue along, but to be honest: it is sometimes hard enough to find one or two companions at all. Requiring one to be a rogue to have access to the loot is a bit queer.
Sidenote: THIS is a good argument to leave it be as it is, since now some chests can be opened without a rogue - and some not.
From my point of view, the whole dungeon is a lower mid-range. The chests in the central chamber have properties that reflect that quite well. Properties like:
- Break DC (after reduction last year)
- Trap damege (after reduction!)
Open lock DCs i will check with my rogue character.
But the three chests mentioned differ there - those are essentially unbreakable. A DC of 37 is simply out of the range for lower-/mid class characters - and i do not even know if high levels can do that. That requires:
+ Roll a 20
+ Str-Bonus (let's assume a high bonus from a melee specialist) +5
-> 25, not enough
so let's replace the str-bonus with the crowbar (+9)
-> 29, not enough
i just realized that the crowbar REPLACES the str-bonus, so even buffs do not help ...?