I find your delineation between DA:O and DA ][ interesting, as they were practically the same system. I think DA:O had literally only one more category than DA ][.
Well yes and no. It was kind of alike - i give you that - but still with some weaknesses in the sequel.
Like - as mentioned - creating different screens for different categories. One for weapons and armors, one for belts, necklace and rings, one for potions and runes and one for... well literaly trash.
So, i had to scroll all around to find this and equip that - other than having everything on one screen like in origins. And... well... the trash alsways filled op the whole bag pretty fast without noticing. Like: "Why is the inventory full, there are only a handful of weapons and rings (scroll, scroll, scroll)... oh... 63 trash-items.... i should have guessed.". This and the star-system.
That's why i make the difference between DAO and DA2