Actually, I thought it was going to look bad with four nacelles, so I'm surprised it looks good.
The lower nacelle just needs to be lowered a little and flipped upside down. Or just remove the lower nacelles and forgot the idea of double coil sets in each nacelle, it's not necessary.
I like the new hull detail.
Since you have the turrets up top exposed, I don't see why the lower ones should be. Besides, if there can be ships like the Akira and Prometheus, I really especially don't see why the ship's teeth shouldn't be fully bared.