Nicely done
It interests me how much skull imagery is a near-universal in medieval themed combat games, whereas a more heraldic style rarely if ever gets a look in. Of course skulls were used in medieval art plenty (though often actually in rather jollier roles than they're portrayed in games, such as danse macabre imagery), but it definitely feels like they've become a staple expectation in modern medieval aesthetics to an extent where I feel there must be a bunch of other factors playing in.
I know what you mean. In my game, the themes of warrior, violence and death are more prominent, that's why I put more emphasis on skulls even though it's medieval themed. I feel like the traditional heraldic style is more suited for something that is less over the top violent and more grounded in its fantasy, like what you can find in kingdom come: delivrance. I think the reason skulls seem to have become a staple in modern medieval aesthetics is that they're often associated with fantasy... and the medieval setting is often used as a canvas to build new fantasy worlds.