Dice Rolls: Forgot to mention this. The rolls all feel the same, with no benefit from my stats or proficiencies. It would be awesome to see the +3 or +5 out to the side of the roll. Once the roll completes, the +X and the die slide together to form the total.
Advantage/Disadvantage: This should display two dice. Both roll, then the higher or lower is selected, making it obvious what advantage/disadvantage is and how it affects the outcome. Make those dice red for Disadvantage, and some other color for Advantage like blue. Default dice could be yellow. These visual updates would better communicate what is happening.
I get what you mean, but the modifiers are actually subtracted from your DC, instead of added to your roll. I think it's for making it easier to grasp what you are seeing.
I like the idea of advantage/Disadvantage though, it would make it feel more powerful.
