Well, there is the encumbrance mechanics, but it's undermined directly again by "send to camp". So agreed, when making stuff complicated do it for good reasons (world building and immersion).
There's no need to remove encumbrance whith shared inventory. It simple can be equal to add individual encumbrance of your active party members together or they can simple make and average encumbrance x4
But, you are right though, having the "send to camp" make the whole encumbrance mechanics worthless
