I like the general aesthetic style and shape, but I agree with Raven in that it needs more variety in the overall shape/structure.
I think for the kind of ship you're going for, it looks too thin--it's hard to imagine a ship like that holding all of the things you want it to, and such a thin ship makes it difficult to edit things around with regards to turrets and some subsystems (ex: how is that BGreen turret mounted on the outside of a hull piece barely 5 meters thick? - kind of questions).
My suggestion would be to expand the bottom-middle area, and put the fighterbay/entrance there (either in the front or back, with the entrance being cut into an angled section at one end; may be an interesting idea to have two entrances so it looks more efficient for operating craft that are coming or going at the same time). Essentially, the centerline 'body' would be taller, perhaps jutting out with a few large, shallow curves/bulbous sections (think Halo's Covenant ships) along its length.
It also could use some more curves--Vasudan design is all about curves, and this is rather lacking in that area. It's almost there, but a bit short of it.
The 'nose' section--might be a good idea to 'raise' the upper part of the nose, so to speak, so that you can place turrets there that are capable of shooting targets in front (as well as a decent degree above), and to give the ship a more 'full' and shapely aesthetic. The Hecate's 'massive bricks connected by comparatively small sections' aesthetic is difficult to pull off well (and the Hecate arguably doesn't).
Just some suggestions; I think you've got an interesting concept here so far, and I'd enjoy seeing what it looks like in the future.
