[Sawrock]

In West of Loathing there is a Snake Pit. You can fight unlimited snakes to get unlimited EXP. Why don't you? Because there's no real progression- you could just as easily be fighting monsters elsewhere and gain EXP while also getting map progress.

In this vein, at the back of many dungeons there should be an interactable tile/object that lets you spawn an encounter from the dungeon. The actual on-map encounters should still exist as a means of progression through the dungeons to the boss, but this way people won't be able to map-clear a dungeon and be forced to wait for respawns before continuing their grinding.