I like the shape and your use of patterns and slabs.
The rest still needs some work.
I'd recommend thickening the pylons running out to the engines, the one block thickness feels too thin for attaching such large engines.
The top of the turrets is very cool and BA, but the underside could use just a touch of detailing wrapped around from the top. I'd also thicken the forward wingy bits that the turrets are mounted to to make them a little thicker, and a little more substantial. Again, they look too thin too support the larger turrets.
I'd also adjust the turrets and have a more substantial attachment point and drop it into a turret well on the ship. Some kind of nice thick neck or ring where the two come together, the hinge like bit you're using now looks on the verge of snapping off.
You have a really cool pattern started on the main hall, but the bridge feels very empty. The vibe I get walking down the hall and up to the bridge is that of an abandoned and stripped alien ship.
FInally, the outer hull is kind of bland, you have a lot of flat grey spaces with nothing going on. I'd add plating, or maneuvering thrusters, or sensor pods/flats, or vents/heatsinks, or just some pattern and lighting effects. Something to break up the sections of grey.
I hope this helps, and I look forward to seeing the ship when you finish! :)
Honestly these are all things i have written down as "to do" to the T. For me, 90% of the ship is getting the ship a shape and performance i like. Then the last 10%-20% or so is in the details. As it stands, i have about half of the details in. But i ran out of time this weekend. Expect the finished version by about Sunday-Monday.
But also bear in mind that i am in the camp of people who think too much details can be detrimental. I'm not sure where it become the norm in SM to where every square inch of a ship has to have something protruding out or some form of variation. But you will never see such things in real world designed transportation. That would be referred to as being "to busy"