I had six Dilgar variants drafted and partially tested, plus the (hypothetical) superdreadnought; a command variant Tikrit, a fast assault cruiser- not quite capable of keeping up with the strike cruisers but a big step forward over the assault ships- a sniper style, superheavy bolter armed Dreadnought (war), a less forward focused Battle level strike cruiser for which I cheerfully intended to half- inch the Tratharti name, after all Mongoose aren't using it now, are they? A Raid- class disruptor torpedo heavy missile cruiser, and a more conventionally laid out Skirmish level fleet destroyer.
They haven't been posted because, well, two reasons.
The in game reason; perfection is the enemy of production. Keep tinkering with a warship, or a fighter (Me262, type XXI U-boat, Tiger tank, the list of merely German WW2 examples is very long, and you can find many more from other nations and other wars if you look), and you run the risk of delaying it's actual entry into service until it's too late for even a genuine wonder weapon to achieve any real effect. The Dilgar had their backs against the wall- to be strictly accurate, the nova. They didn't need perfection eventually, they needed good enough, right now. Arguably, with the Tikrit and Targrath, they had it. No doubt they had many, many designs on the drawing board, ready for phase three (sieze territory, consolidate, expand outward again), but that was where the majority of them stayed.
The out of game reason; I have enough trouble finding opponents for my Dilgar with official, sanctioned, there's-the-logo Mongoose designs. I virtually have to throw a temper tantrum every time I want to field them, and while I do get a chance to trot them out from time to time, I'm not that good an actor, not on a long term basis. It erodes your credibility, and while I'd like to claim that I'm pretty incredible already, :lol: Rule 2 forbids. Getting the locals or the Dunfermline crew to agree to house designs on a permanent rather than playtest basis is possible...but not for the Dilgar. They are seen as too good already, the threshing machine doesn't really need another blade.