I am guessing Africa (aside from North Africa) was left out because there was minimal European exploratory or military activity there until after the time period of ETW.
'Course, Portugal being represented by 1 region is really no worse than France being represented by only two. The super regions of ETW are really not suited to the territorial trading that went on in conjunction with the wars of the period. Specifically, beyond the fact that the German and Italian states were really more fractured than represented, the ETW set up makes it impossile for Britain to get Minorca or split Naples and Sicily.
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