Regarding the Mon Calamari. I have to agree that the Amphibious race trait is going to be useful in game very seldom. Therefore, I would move it to a flavor description of the race, instead of being a race advantage.
On the other hand, the Education skill feels ok to me, it is a useful skill and it grasp the flavor of the Mon Calamari advanced civilization, that has high regards for art, science etc..
I was thinking that another very iconic aspect of Mon Calamari are their ships. What about then substituting the Amphibious current advantage (which would become a flavor of the race) for one rank in Mechanics skill?