With regard to #RedHack’s under/over rolls, if we’re setting aside the range 2-7 for particularly difficult skills (such as Thief skills) this implies a division of the non-critical range into three sections of six, and these could be used to correspond to five different levels of success:

1: Unlucky! It happens to the best of us. 2-7: Basic: Almost anyone could do this. The inept occasionally, the skilled routinely. 8-13: Expert: As hard as scaling a sheer wall. A competent person can do it, if they’re lucky. 14-19: Master: Only someone of exceptional ability could achieve a result like this, and not often. 20: Lucky! The fool sometimes prospers.

One area this could be useful is when we need a range of outputs, such as when identifying items, understanding languages or recalling lore. For instance, a basic success on item identification is only possible for a thief, whose discount and bring the difficulty below 7; while a master result is only possible for a character with high INT.