The new guns are a huge improvement. Much better integrated into the whole of the design, though with those huge missiles up front the ship feels a bit smaller than I know it is even with that little man on top. Maybe three rows instead of two? Gotta say I liked the contrast between the grimy metal and 'clay' in your last set of renders showing off the engines, really felt like the shell of a new ship built around an older one. The paneling obviously helps with scale, and I'm assuming you still have some tweaking to do with it, but there you have it.