The chest should definitely be an available resource when you’re long resting, I’m actually surprised they didn’t implement that along with the whole camp supplies mechanic
I assume they don't want you to hoard camping supploes, and have them in the inventory as a sort of resource management (aka. Pathfinder), but why would I, if I only need food when camping? Of course I will send majority of food to the camp and only pick it up if I need it.
Also, not being able to split gold in the barter menu isn't good.
I am curious why would you need to do that? Remaing balance is automatically matched with gold, unless you are gaming reputation system but giving out free gold?