The 14th ammendment was not intended to address the subject of Natural Born loyalties. It was solely intended to convey citizenship and attendant voting rights to persons lawfully born within the US.
Many people are lawfully born here that are not Natural Born. The child of a soldier born on a military installation would qualify, as long as both parents are citizens; that has never been in question.
I think most people understand that NBC status is a combination jus soli vs jus sanguinis (territory vs blood). Despite the seeming simplicity, there have been many views opined which reach different conclusions.
In terms of the situation of military children, there are different views. Donofrio (Natural Born Citizen) holds that such a birth would not confer NBC status to military children. In fact, he did not believe that either McCain or Obama qualified as a NBC. I have heard of situations where military personnel were informed that their children would not be NBCs if they were born abroad and that some women delivered their babies in the US to avoid this possibility.
If there were a simple solution, Obama's eligibility would have been resolved, one way or another, by now. But with a Supreme Court that, for example, has created brand new rights (e.g., abortion) without any reference to the text of the Constitution, you can't rule anything out, especially for its liberal branch.