We intend to have skills for multiple elements for each weapon type, but maybe not always every element.
For example, the Quarterstaves with the Monk. We have a well developed Lightning, Cold and Physical (wind themed) set, but don't have a developed Fire set.
While this is not always respected, Fire is loosely aligned with Strength as an attribute, and it's the exact opposite in terms of attribute alignment with Monk (Being Dex/Int).
I still try to add a bit of synergy just for kicks though. We have skills that interact with elemental ailments, and we make sure to include a Burning interaction just in case someone wants to try and make a build with it.