This is an interesting model. Parts of it are quite nice and blend in well with the vanilla aesthetic, while other bits are out of place and a total eyesore. The top 'fin' for example needs to be axed or reworked completely, I'm not sure why it's a girder with a random tube stuck in it, but it needs to go.
The vanilla cockpit could be redone, it's going to be quite a pain to get looking right and could be replaced by something more modern and angular (see Upholder, sans poor quality).
The engines built into the wings are kind of cool, but they look out of place compared to the central engines. I'd suggest removing the center ones entirely.
Oh and yeah, this would make a much better replacement for the Upholder than the Executioner.
Edit: We actually already have a replacement model for the Executioner, too.
