So, I played around with regular games for a while to get a feel for the game before I went to play the campaign.
I've gone through 3 campaign missions and into the 4th after I noticed something funny on the first one. The Drengin weren't building combat ships. They build a few constructors (Though from the picture of them while they were in orbit they "looked" like small sized ships), but no combat ships of any sort. When I played up to where the Yor come in, they, too, do not build any combat ships. The Arceans and the Altarians do however build combat ships. Really no sense in me playing the campaign any further unless the enemy is going to fight back. Difficulty was set to Normal.