Some tables use different critical damage rules or calculations and it would be nice to not have to do it in our heads or on a calculator. For example, my table uses something I've seen call Crunchy Crits, where instead of rolling double the dice, you treat the original dice as rolling maximum damage and then roll the second set and add it to that. So if somebody were to crit with a 3rd level Divine Smite, then you would treat the original 4d8 as having all rolled 8 making the damage a guaranteed 32 plus your strength mod making it 37 if you have a 20 in strength and then you roll 4 more D8's and add those to the 37. It would be convenient and nice if we could have a toggle button in the character sheets advanced tab that turns on a feature like this so that it does it automatically.