You see, you have answered already
<Zho precog alert>
More seriously there will come a point where the starship design rule options are spread across so many supplements, adventures and JTAS articles that another edirion of High Giard, a third edition, will become necessary so that authors have the tools they need in one easy to refence place.
If only there was a portentous year coming up where a brand new edition of Mongoose Traveller could be part of the celebratory event...
and it better include a Bu and Embla coffee table art book, a Visual guide to Traveller, the same landscape format as This is Free Trader Beowulf to keep it company on my shelves (may need another set of shelves soon).