Now I apologise if this has been suggested before, but I did think about the other day a feature which allows the GM to toggle via a command in chat, or the like, that roll results are displayed as totals only. This meaning that even if you hover over or so, you cannot see the modifiers of that roll but only the resulting output of it. If you want to go even further, another option could be added to make it so you can't even see what kind of die was rolled. This could be useful for GMs who want to let the PCs see what their results are in the open, but not give away what kind of modifiers (which could give away stats) are affecting that roll. Perhaps marking it with something such as "modifiers hidden" if hovered over, if said roll had modifiers, could also be useful.