In a normal PbtA game there is no difference between snake eyes and any other result of a 6 or less (rolling 2d6 plus stat). There will always be something significant on a failure.
Yes. But it also does not higlight the difference between 2d6 and 1d20. Even +5 bonus would not have helped.
I want to know how the tent curve actually enhances the game. Why it is important that each +1 bonus is worth twice as much, because the DC is 7. The middle of the tent curve.