I like the shape of the ship and the plated hull does a good job of breaking up the negative space. I'm loving those green engines too. There are however a few things I don't like. The cannon turrets are a bit too plain and seem out of place because they're just not as good as the ship they're bolted onto. I'm also not a big fan of the hazard cones up front. I would replace the hazard blocks with grey hull which is a lighter shade and so it would work as an accent colour without being too busy. The black parts of the engines are a bit too big to be just flat black armour so maybe add some depth to them or some details like pipes or exhaust vents. I also think the top of the bridge needs a little something. Maybe an AMS turret, or a radar dish, or even just a simple raised octagonal plate. The antenas could also use a little colour variation. Instead of just a white light at the end try a dark grey block, then a coloured block, then another dark grey block, then a white light block or rod. These are all just my subjective opinions but give them a try and see if you like them better or not.
I agree looks a lot better to change the hazard armor, also for the antennas. The black armor parts around the engines have now two openings on topside. The turrets on the other side... well I simply dont found a good successor for them, this are my oldest turrets of them all, and call me nostalgic but I still like them for being this. The quard barrel turrets on rear part of the ship was a try to replace the older penta barrel turrets, but they have problems with the fire arcs,
They simply cant aim high enough for a good fighter cover and building them higher destroy the design.