I posted Early Access Build 20170818 of Disputed Space. This build includes two new enemy ships for the red faction. The new enemy ship are both mid sized (between small fighters and large capital ships). The two new ship names are "Frigate" and "Hullsmasher". You can find these new ships on any levels where you fight against the red faction. Try level 3 to start.
More details:
Frigate - large rapid firing lasers
Hullsmasher - torpedo and missile launchers