The current system must be changed. Noy only it creates total disbalance between the classes, it's also stupid from a roleplaying perspective, when you're encouraged to rest after every fight like oh you fought couple of harpies, you're tired now. Not very in the spirit of adventurer/hero/villain
In this respect, it would be no different from other DnD games.
Of course, you can come up with some limitation, but the game should not turn into survival.
Limiting rest in some areas would be a better solution.
You could still step back to rest, but that is still unavoidable.
You will never achieve a balanced rest if the game is not fully linear. For this reason, you are not even able to load the CD.
No one wants serious time limits, apart from a small fraction of players
