Which is why rolls with advantage/disadvantage should show both dice and highlight which one is used. It would immediately make the whole concept so much clearer to new players. The same should apply to skill checks, incl during dialogue.
I agree.
I'll say it again but just take a look at Solasta please.
Their UI is very clear and very friendly user especially for newcomers.
The audience is not the same but I guess Larian can find something to overhaul BG3's UI for it to be more D&D, more BG, more clean and more friendly user all together.
Showing a %to hit when you target creatures then a rolldice during the attack animation should probably be good.