It would be nice if each race had its own weapon style. As for unique weapons, it sounds nice but increases the balance problems that the game sometimes has. I think some support modules being unique is a more reasoned approach. That way you could have a more diverse approach. Drengin and other evil beings could have something that could enhance weapons in some way, while Altarians and other good races could have something the enhances defenses. Terran and the pragmatic/neutral could have modules that enhance speed/range/hps and the like. Of course, this could also go into the ideology trees as well.

But will the models be different for each race?

Glad to hear that! Of course each race still needs access to the basic weapons, but could they be further diversified by special weapon augments? 

In the current build you can research that missiles take up less space. Could something like this be further broken down and made only available to specific races? E.g. Drengin can research an augment that allows for more kinetic weapons to be installed on their ships.

Yes please, pretty please! 

Well, if I could choose I would prefer different weapon models with different animations and different stats for each race. But that would be a lot of balancing and animation/modeling work.

Combat is not even completely implemented yet, so I'm just throwing around ideas. 

You could address the model part issue yourself in the ship editor by scaling and combining parts and placing it so it covers the real weapon model

I believe we are getting the functionality to export new parts by combining old parts, aren't we?