My suggestion for a limit to Long Rest is remove all the food they have in BG3 and then add a limited number of "rations" You need a ration to do a Long Rest. Now they can control how / when you can long rest but controlling when you get rations. Not perfect but could be a way to limit long rests. I actually like this idea because it would keep the pressure on you to move quickly. Food is basically just more gear to trade for equipment as it stands now.
"Old time love song will die so swiftly.
You never trust me-
For a while it was nice, but it's time to say bye....
I'm cold, you're so cold-
You're so cold, you're so cold-
No-no-no, cold, you're so cold...."
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