Hmmm, having a col ship at start shouldn't be of much use in standard game IMO but ... if we could have a pair of "super colony ships" in Proportions mod - say things carrying 20 M people and having taken 20 years to build (with a huge hull at awful price) - THIS would be useful
!
But I suppose having a ship at start can only be made with "scenario", so it could not be widely used, too bad ...