I think the problem with that is you have a lot of:

Flavor: X/Y

Instead of:

Flavor 1: X
Flavor 2: Y

That is, instead of spreading Healing Jobs out to cover more options, you're clumping them together. Imagine a store that, instead of having Small/Medium/Large/XL only sold Medium, Medium, Large, and Large. This means Small people are only able to buy stuff that's kinda big and baggy on them, or REALLY big and baggy, and XL people are ripping out of the clothes every time they bend over or anything.

I'm going with the working assumption we all agree that AST should have dAST and nAST again. So I'm treating them as two options, mainly because dAST having near-WHM direct healing vs nAST's preparatory actions like SCH or SGE, making it a bit higher on the spectrum. dAST has things like Earthly Star and Horoscope, of course, but also more raw healing.

Granted, five flavors from "no sauce" through "mild", "medium", "hot", and to "very hot" is probably sufficient to meet everyone's needs. Provided we DO have something in EACH of those slots... I'm also not sure the point of mixing types. Like saying to a person "You want extra hot? Alrighty, so I'm going to give you some extra hot...and also some mild. You know, because making it extra hot across the boa- What's that? You JUST want extra hot? Come now, surely you jest!"