Ok, so, I tested your ships and also fought against them and...
Well, for one, when I tested the Irithia-Class Combat Carrier (Exigency Capital, the only one for now, which I gave a reinforced hull and armor), I put the Arbiter-Class Artillery Destroyer in and...
It one shot my Irithia (which had over 19200 hull, that's quite a decent amount). Furthermore, most of your weapons, being superheavy on damage, also cost about 0 ordnance points (i'm not sure if this was a mistake or was intended).
Also, your ships (your capital in particular) can travel with over 10 burn, which is unusual. If intended, that's pretty fine, despite it being a capital.
On another note, your weapons usually may have a high reload time as well. If you're going to decrease the damage, decrease the time it takes for the weapons to reload as well, and give them some ordnance points in balance of their capabilities (if you're still working on the mod, or have the time, that is...)