I think the issue is that Wes has been trying to get the SARP's technology presented to a more manageable level little by little. Granted, this has been a slow process, but submissions are starting to show more moderation and a leaning toward efficiency over brute power.
The DD4 sort of comes and kicks that intent right in the face. What we are having here is more than just a case of 'the NDI has traits which are stronger than the Star Army of Yamatai' or different outlooks on warfare (like in the following quote, taken from the Uriko.):
In the end, the Star Army version of the Uriko bomber was a much stealthier quick-strike unit, whereas the NDI version as a slower, offensive juggernaut bristling with an array of weapons. Each version of the Uriko reflects each faction's distinct strengths: The Star Army prefers exceptional grace and finesse in the field of battle, using Nekovalkyrja pilots. In contrast, the NDI Spacy prefers to bring to bear overwhelming and merciless firepower upon their enemies, relying on AI systems to do the job.
That differenciates both side, but that's not the actual problem. The problem is a different point of perception and outlook on each setting, making the SARP and the universe the NDI is in imminently incompatible. For example, for you, Derran, the Super Phalanx C might be the hottest power armor around... but to Wes, it's around the level of the KFY Kylie - even if, in your mind, the Phalanx C would be so incredibly powerful that it could wipe out three Mindy armors in a row and not break a sweat.
My suggestion is to allow the DD4 to be toned down. I really don't think it even needs half the guns it has to be able to give a good showing of itself. It could claim being a very fast ships in the hands of the Nepleslians even if it just went at 200 000c FTL; 6 LY/m fold. Its not because the NDI can make super duper starships that they have to give the Nepleslians the very best they can manage back home. Another point would be that it could be nice if you could make a NDI ship for the level of tech the SARP is trying to tone down to (or at least not exploit so blatantly) instead of just tacking so much stuff on a spaceframe with the thought that bigger numbers makes things cooler. And that's considering the DD4 isnt all that large for all the hardware she packs.
I appologize if I sounded harsh in the above statement, as I still think its very swell of you to help Tom out... but the DD4 is going a bit too far for this setting's aims (in which, yes, Yamatai is the meaner, stronger, older sister to everyone else)