This actually makes me increasingly think that careers should not have been included at all, just specializations. As it stands, they seem to mostly be an artificial XP Speedbump that is mainly there just to save on printing the same skill lists twice in a few places. I wish I'd thought to bring that up in the EotE beta. But admit the thought never even dawned on me until seeing the AoR beta.
But the careers provide a nice base of career-skills, some of which are different than those included in specializations. I like the option of more than one career providing the same specialization, because it makes sense that way. Now, a pilot can be WILDLY different than another, given the focus on different career skills and different rank choices in their career and specializations.