The team is 1 programmer, one designer/tester/writer, one artist. Adding more people before all core systems are in will slow the development down.
Ship designer is not currently a priority, and will not be a priority until the draft campaign is finished and game launches on Steam. Then the ship designer will start improving rapidly as the whole scope of requirements will be understood.
We will of course try to improve it during this time of campaign development and deployment. But this is not going to be radical.