I played a bit with some ideas/sketches turning it to a series of ships with a shared basis:



A smaller one with most of it's engineering inside the main hull, and the current one with a separate nacelle or engine pod, aimed to vacuum flight, and both might have a variant aimed for atmospheric flight, with wings.
There could be a passenger and cargo variant for each, and if I can do it right, all of these can share a single texture map.
The silhouette of space only with an engine pod is almost identical to the original one, only the engine pod is changed a bit, and it's not visible here, but I repeated those antennae stuff of the top to the bottom and I want to turn it into aux heat sinks most likely. The biggest difference in it's shape is the reworked cockpit area.
What do you think?