The reason why not automatic jump is the double wield since the off hand attack uses the bonus action if you jump you can't attack a 2nd time.
But the inventory is already shared, and actually I never used the throw action in the game it could be useful only a limited situations I guess. So for example you could cast a scroll/use a consumable directly from an other characters inventory
That's true that the healing items not that useful in the current state, but if you look at the full picture maybe there will be some limits to long rests. And actually it could save your life the best example is a night raid in your camp, and on the other hand the small potion is 2D4 if I'm not mistaken but a big ham or pig head or whatever could heal you more not sure about the exact numbers. And I only use the healing spells if I need to like when a party member got down, since currently the most useful battle behavior is that you hit hard and hit fast.
