I guess there's something to that, but relations were also stronger then. Personal opinion, but I think in a situation where the alliance is on the verge of collapse because of xenophobic tensions I think that paranoia would trump industry practice on that point.
Also it just kind of hit me, maybe this massive new wave of ship construction is the reason the terrans economy is hurting so bad haha. I mean, look at FS2, thirty years after the great war. There are still a great deal of ships from the great war era in service, albeit refitted.
But the Deimos in particular is described as being ultra modern and the foundation of tommorow's fleet.
Fast forward 20 years and we have two new corvette classes, two new destroyers and more cruisers. I mean, I am fully behind that, Terrans needed a much more diverse fleet, but i guess the Deimos just couldnt hold up the day after tommorow's fleet