Been a while since I've stopped in here, and I must say, the new Diomedes and Chimera look amazing!
However, something just seems... off with the proportions of the Bellerophon. The engine section seems massive in comparison with the front half, and it makes the model look back-heavy. Other than that, I love the direction you've taken with the TEI ships and can't wait to see what you do with the destroyers.
edit: I think it might just be the orthographic projection messing with me. Considering I spent last semester in an engineering graphics class, I should be used to it, but, well, it's been a long summer.
Also, both of the Diomedes v1.1 models have the width set to over 1300 meters (the v1.0 models had it set to somewhere around 400). I don't know if will cause issues in game or not, but I thought I'd point it out.