In the description of Neutrality (from Xeno Ethics and under Ethical Alignment in Civilisation Manager) states that I will get "Additional weapons and defences" ... I have yet to see any such, though I have not yet played with every race under ToA.
Will we see something official in the 2.0 version?
In the meantime, I'll try to mod something researchable for neutral aligned.
Probably a weapon training tech, or something.