Fleet - Scuttle
Sometimes you just want to get rid of a ship more than mothball and bring it to port.
Scuttle ship and make it a derelict. Set it in a stable orbit etc.
Edit: I'm just blind
Refit - ComparisonCompare new weapon with current (button to lock one in place)
Edit: This might already be in, but in that case: How does one do this?
Refit - Reset SimulationRun the simulation again with the same adversaries
Combat - List of ShipsIn the Command view (?) have a tab from which you can select ships or groups of ships (holding shift)
Combat - Battle DiaryA list of the events in combat
Also, ability to click entries (e.g. about your ships) to select it so you can ask it to pull out etc.
Combat - Freeze!
Ability to see your ships drift, and/or which direction you are travelling.
Ability to push a button to stop
Edit: Pressing "C" resolves this perfectly Combat - Demand SurrenderAbility to demand enemies to surrender and hand over their stuff
What better way to pirate things, than to just ask traders for their stuff. Without fighting!
Combat - Tactical DamageInspiration: Battle Brothers
Having certain systems being damaged or knocked out during combat, as well as
Edit: as well as taking some time to repair after combat.
Raid - Heavy WeaponsHeavy Equipment gives up to 100% bonus to Salvaging.
Heavy Weapons could give up to 100% bonus to Raids (makes you want to keep some of that in reserve)
Intelligence - Sticky NotesAbility to show important messages when travelling (e.g. below new messages popping up, and lock them in place there)
Intelligence - ArchiveAbility to put certain updates into an archive
Intelligence - SortingAbility to sort and pull up intelligence items for a specific system (and archive them once dealt with)