I love the mechanic, it's my favorite addition with patch 5. The formula can be tweaked with, but the I love the immersion aspect of needing food, making healing abilities valuable again, and toning down the meta of casters rest spamming. I would like a supply chest at camp you can just store all your supplies in for weight and inventory management.
I wish there was another reason to go to camp, so I'd be more likely to see camp cutscenes and story elements. Anything I think of though, that would also include martial classes, like a fatigue meter, would be too much UI clutter and tedious. Maybe having to go to camp to level up could work?
I'll also be interested to see if Larian will buff good berries or add conjure food and water spell for the supply mechanic