I absolutely love the idea behind the PoE resting system. I am supposed to constantly be making tough choices on how I manage my spell/ability use and health. I find this mechanic to be very fun and interesting, and if it were implemented/balanced properly it could be challenging.
As it stands though, there is no limit to camping. There are no interesting choices to be made in battle because I can simply use my more powerful spells/abilities without any consequences.
For the most part I do my best to play along with this system and it's intended design. I base my decisions in battle as if I am limited by my 2 rests, but I can't shake the feeling that I will beat the dungeon no matter what. It is a forgone conclusion because if I'm really struggling due to mismanagement of my spells/health, it doesn't actually matter because all I have to do is make a trip to town and then come back reloaded. This is disappointing because I love the mechanic and find it really fun and interesting.