Why not make a inventory system like in Diablo : big things more space than little things
OR heavy things more weight than light things
OR both rules at the same time ?
Plus carrying capacity is depending on a stat of the hero (strength - or condition).
Plus something like in Divinity II, but with the possibility to read books without forcing you to take them all with you . And possibility to drop items OR store in a chest, barrel, cupboard, pit, grave, etc etc ... like in DD ! (from the beginning of the game, not only in "a battle chest"!)
Skyrim is not bad nor good system, it's a system that is good because it let the player be free to go his/her way: take ALL loot or just take what you want, it's all up to the player !
But I really hope in D:OS (or Divinity III!) the player can
at least DROP items like in DD (or Skyrim or ...) when overcumbered ... that will be nice
