I think that for those of us who do use the Crew action rules Fast Thinking Captain is fine as is.
I can't myself see any way it can be modified in a sensible way, which will not impinge upon the Intuitive Captain or Skilled Tactician.
Maybe you could link it with avoiding collisions by allowing him to change a card if a collision looms, and call it "Advanced Ship handling" or some such.
Rob.
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