Last Epoch has loads of treasure chests, and none of them are particularly exciting. While I do open the chests if I happen to see one, I would never go out of my way to actually look for them. It just feels vastly more efficient to simply bee line for the quest marker, pick up whatever gold you happen to come across along the way, and then do a few gambling rolls in town whenever you feel like it.
One way to spice up the loot hunt and offer some actual incentives to explore the game world could be to implement a system of tiered treasure chests. For example, although I’m not a huge fan of Grim Dawn in general, I think they handled their treasure chests quite well. GD has three types of chests*. The “normal” chests serve as your generic loot pinatas and can come in a variety of sizes. Then, they also have a set of sparse and often remote “one-shot” chests that offer a guaranteed random epic, but can only be opened once per difficulty (i.e. they don’t reset with the zone). Finally, they also have a set of “treasure trove” chests that can spawn randomly at a few different points in certain zones, require expending a dropped key to open, and have a higher probability of awarding important progression items, such as crafting recipes.
Given that the zones are limited in size, it seems like quite a waste to me to implement a bunch game space that few will ever bother to visit. Adding a more interesting treasure chest system than the one currently in place could potentially serve as carrot for people to engage more productively with the zones that you’ve no doubt spent a lot of time and effort on creating, instead of just blazing straight for the next exit.
*They’ve also recently introduced “totems” as an additional source of loot, which are really just high quality treasure chests that also spawn rare mobs.