Well, the changes to the nacelles are too subtle for my addled senses to pick out. But I will say you've either done something right or they're growing on me. I definitely like the overall shape and details of the things. I suppose the only thing that bugs me about them now is the way they just fade out towards the back in your side view. Maybe if you had a spotlight back there instead of directly over the glowing "flux chillers"?
Of course, in the rear shot, they look terrific, so it might just be a question of knowing the ship's best angles and lighting.