What you have looks more like a BC-equivalent ship, let's say an "NBC New Battlecruiser". It is beefier and more powerful than an NCA, which is good, but it is way too small to be a DN-equivalent ship. The rear hull would need to be significantly bigger to make it into the DNW.
The unfortunate part of this is that this ship looks pretty cool. To make the rear hull beefy enough to be a DNW, the ship will start to look rather unweildy and probably pretty ugly. Basically, that rear hull part will need to be 75%-90% of the mass of the saucer itself. It is big.
So, let's call your new ship an NBC and ignore that nasty ol' ugly DNW.














