I hear Solasta is concidering a loop on the backpack for big items like a bow
They do have that in the demo actually. I does limit you of course but if you find that one extra-high-value weapon that is too large to add to your pack you can use the sling (if you don't already have it in use). I always felt it strange in so many RPG's that it became necessary to try to loot every item possible to add cash that is sort of became ridiculous on the number of items one would amass in their backpacks. Now a bag of holding could, of course, come into play here, but in many ways is more valuable than in games that don't track the size as well as weight.
