hau Tim, I think the key to your question is "your definition of Quality Potting Mix".
It is very possible to make a great potting mix with the components you listed, but you would possibly run into a soil drainage problem as in, not enough drainage, but that is really a rather small concern since containers hold small amounts of soil.
Pine needles will give more acidity than the rotted pine "compost"( detritus ), I'd hold back the needles to be used as a
mulch to keep the containers from drying out too fast.
Worm castings are great, they will provide members of the microbiome we want in quantity and they provide minerals.
I would stick with the leaf mold and leave the fallen leaves behind so they can become leaf mold.
To all of the above, you will still need some soil, not a lot but you do want to have some since the microbiome lives in it.
Others have mentioned many great amendment items, of them all, the char is the one that would give you multiple benefits and your plants would like that too.
With the addition of some char along with a well rotted or well composted manure, you would have a mix that provides everything a plant wants to thrive.
Redhawk