I experimented with an idea of putting damage types into more formalized rules, see page 8 in my house rules.
I would like to write my adventures and encounters with simply referring to "Mild Fire Damage" or "Severe Falling Damage" to get things moving forward quickly.
A few design questions:
- How would you variate damage between different damage types to make them 'special'`?
- Some damage would be per round unless prevented / treated - how to balane this with one-time damage such as from falling?
- Should fatigue and stress be involved?
- Should there be more randomness with damage like with the official rules 'environmental damage'?