The Resume Flight interface is okay, but it gets cluttered very quickly because you cannot organize the crafts except alphabetically, which makes for very awkward naming conventions, and even so, you have to scroll through all the crafts you've anchored in space to find that one craft to resume flight in. This experience can be improved significantly by just adding the ability to organize the crafts, by grouping them in folders.
You can even create folders in folders, for very complicated missions. This would be such a nice QOL feature. An example would be: Folder: Moon Landing Mission. Sub-folders: Refuel Station Components, Mission 1, Mission 2, Habitat Components, Lander Crafts.
EXTRA: you can further enhance the multi-craft experience in the game by being able to toggle showing only certain crafts grouped in a certain folder, on the map view. Currently, you either toggle every existing craft in the game, or you turn them all off. I feel like this should not be such a binary.
As an example of the merit of only being able to toggle certain crafts, imagine that you are low in fuel in orbit around cylero. All you need to do to find the refueling station is to show crafts under "Cylero Refueling Station" folder, and maybe you've grouped it based off of fuel as well, so you only show the crafts inside the folder "Methalox" in the folder cylero refueling station. This reduces screen clutter immensely, and would especially be great if you have an exorbitant amount of crafts.