[Poruku]

I just don't see this being worth adding

First of all injuries are an extremely minor thing, so you would never want to go double-types at the cost of damage.

Secondly this would probably require some dev time to make double damage types work, and I just don't see the benefit.

Also thirdly split damage has funky implications, like absorb and immunities.

We already have split damage in the form of hexer and ghost spells, where it's two damage instances. I think that just makes a lot more sense to use as a system because then each of them can interact independently. The issue of course is that two damage instances means better odds to crit and trigger momentum bonus and also claret call application, so it's a straight advantage for certain things. So it wouldn't be as simple as just using that system. It would need to be a new system where a single instance has two types, and you haven't elaborated on what this would mean with resistances, reflection, immunities, and absorption.

For resistances it's simple: take the average of both. However, there's nothing in the game that makes you immune or absorb physical types, but that question is still important. I think that's why the hexer and ghost system just makes more sense for that.

To me, this feels just unimportant. In a game like dnd, split damage is essential because it interacts with DR. In this game though, it would have no significance besides IC. But even then, I think what would make more sense is the option to switch between pierce and slash. After all, with a gunsword, the shot and the slash are two different things. A halberd, you either lunge or slice. A spiked mace?... That's where it gets trickier because it's actually split damage. All in all, I just think it's not worth the headache.