Absolutely want to see how I'm rolling.

I don't want the combat to slow down, I just want to see quick dice rolls somewhere when I attack or do a skill check.

The dice explain how advantage / disadvantage works. And it's just better to see the miserable rolls of 1 and 2 when you fail a 94% advantage shot. Or to see how you rolled, period. It gives you some feedback how you did other than just fail / succeed.

They show the attack percentage twice on the screen. Why? The percentage on the left should be the dice rolls instead.