The idea of damage skins is to enable a certain race while attacking to see a more appealing damage text because the white text we see right now is not as appealing overtime.

For each race, there is a different damage skin that is collectable and usable between all races when unlocked by changing races.

Only you can see the damage skin based on your settings similarly to having different ships for races.

Example:
You unlock the lazuli race damage skin by changing to it and the text numbers that appears when attacking has a bluish glow when receiving and dealing damage.

You unlock the zolazin race damage skin by changing and the text numbers that appears when attacking has a greenish metallic appearance when receiving and dealing damage.

because what we really need is a pointless aesthetic change...

"the white text we see is not as appealing over time"

sort of like how the entire game has white writing everywhere

The damage skins is just to get new players incentive to try out all the races.

The white text on everything else looks good already, but the damage skins would look better, especially when clicking a lot.

Making the game look appealing does affect the players who play this game because many people want to see something different and have optional choices to customize their preferences to improve their gaming experience.

This is one of those things that "I won't mind in the game, but Dan could use his time better"

If you are willing to fund Dan to hire a programmer to have this done, I'm all for it. Otherwise, no.

I agree with this.

Also customisation is always a nice feature, I could think of a few other customisations that i would like to see myself

Honestly it doesn't sound that hard to code, but I'd prefer Dan to spend his 15 minutes a week in other areas aswell