I really like this but I was thinking my players would hate it (they are mostly only familiar with DnD 5e). The d4s would be a big sticking point... then I realized I was an idiot... just use d20s and take the highest. Same tables but times 5: 1-5 Absolute Failure, 6-10 Partial Failure, 11-15 Partial Success, 16-20 Absolute Success.
I know this kind of defeats the "Love for the unloved d4s" but I think I would have an easier time selling it...