As the subject suggests, some basic interface suggestions:
a) A “clear hull” button on the ship design screen. It removes all the modules currently installed so you get a blank-slate.
b) Ability to “copy” a ship with at most 2 mouse clicks on the fleet deployment screen. This copies the orders etc too.
c) Ability to toggle tool-tips, as well as the delay-to-show them.
d) Ability to “clear deployment”.