All the background rolls the game makes are cool, but I think they would be cooler if we saw the actual rolls. Instead of just telling us we succeeded or failed an arcana check or a saving throw, give us the option of actually rolling it (maybe put that in the options menu so those who prefer not being interrupted for every roll can keep the status quo).
Also, for the dialogue rolls we actually roll ourselves, I think it would be more satisfying to show the actual DC and then add our skill/proficiency bonus to our roll like we do in actual 5e instead of (if I'm not mistaken) just reducing the DC by our bonus and making us roll a raw d20. Like, if the DC is 15, my bonus in that skill is +6 and I roll a 10, the prompt should say I got a 16 instead of saying the DC is 9 and I got a 10 like it does now. Passing a skill check because the DC is low is boring, passing a skill check because we have a high bonus is awesome. Give us some big number endorphine!