I really like how your generators just evolve and that you expand the assortment of generators.
Something I'm looking forward to is seeing the different types of sails if you get to it. It would be cool to expand it to generate ships with designs from different countries and eras... also a slider for wear and tear would be cool.
Something that is a must have would be a flag, though.
I hope I don't come across as demanding btw, seeing a new generator from you is just so exciting :)