I do intend to make a new asset pack with more iso angles and newer ships. As of the moment I am also working on couple on unity specific features and a sci fi land vehicle pack. Since I see there are more request for this types of pack I will surely put the development of a new spaceship pack higher on the development list.
In case you need more iso angles of existing ships I did make a 32 direction for several ships on a custom request. We can discuss about it on my discord quartzhorizon77.