[Irondrake]

Primal Rite and Esoteric Rite do not change the weapon damage type, it changes the type of damage for the Crimson Rite die which is added to weapon damage. That's a whole OTHER problem though. I do think Custom Expressions and setting up one ability for Primal Rite and one for Esoteric Rite would be the way to go. I'm not very familiar with custom expressions though. Do you know if there is an example of this in the 5E data files I can check out?

There are three Primal Rites and three Esoteric Rites. A sub-class option adds in another Esoteric Rite type as well. We aren't adding any elemental types or damage types, they are all the preset 5E types. Each Rite has a name and when selected, the Crimson Rite becomes that damage type. The Rite would be selected when invoking the Crimson Rite.