I feel that putting a cap to the amount you can rest would add an extra layer of depth to the game.
It makes all resources (spell slots, potions etc.) that much more meaningful.
So maybe this is just an EA feature, but currently you are able to take pretty much as many long rests as you need within a dungeon.
This somewhat trivializes resource management?
You can be full health, and full spell slots for every encounter if you really wanted.
I'm not sure how to implement it, but you should have a limited number of rests depending on the length of the dungeon
If the above were to be implemented.
1 short rest per day is limiting - maybe 2-3 per day
This would require you to actually prepare for a dungeon
Potions would actually be important.
I don't know about anyone else but I have yet to use a potion as I can just rest after every encounter if needed.