They could go a long way to fix it if you could interact with equipped items on the same screen as the inventory.
This is my only complaint with the inventory system. Otherwise it's perfectly fine, maybe the ability to select multiple items to mass-move from one inventory to another, but the inventory already provides sorting and filtering options. Not much else is really needed.
Also "I don't own BG but other people" yeah maybe try it yourself before you determine whether or not it has a major flaw.