I don't really think there is a problem with resting except a "cosmetic" one (the fact that it looks a little bit ridiculous, both for short and long rest).
You can't really limit resting because it will be boring... What are you doing if you can't rest but absolutely need to ? Going to the merchant to buy rations ? Restard a new game ?
The problem about resting is that we have to rest after every 1 or 2 combats... I don't have enough HP, not enough spell slots, not enough features... To deal with more.
Every combats are special and nearly none of them are easy. There are surfaces everywhere, casters everywhere, combats are slow and you often need more than full 1 turn to kill 1 ennemy... Then it start to suck if you use your potions and your spells... Then it's done and you're out of nearly everything after 2 combats...
And finally, you have to short rest after a batte, then long rest after the second one...
I think of an easy solution to balance all that : change nothing, just increase the party size
Of course random encounters would be awesome and increase the feeling of danger and the need to choose the right moment to rest... it would add a real consequences and a natural ""limitation"".
I love the Idea but add this in the game and atm, the right moment will be after every combat...
