Future Starship Updates and new crafts

As of version 1.5 most planned features are implemented. That means that there won't be many Starship Updates anymore. First I'm going to program the last main vizzys like interplanetary flights, but these are very complicated features that require a lot of time. Hopefully I can release V1.6 in July, after that I'm going to start a new Vizzy. Some of my ideas for other vizzys are Falcon 9 (low amount of features, hard to create a vizzy, can transport cargo (unlike the starship)), a space station (must be one launch -> small or hard to control, there aren't many good and mobile friendly space stations with a rocket) and a manned Cylero Flight (low amount of features, many bugs due to a complicated vizzy). Which one should I do?