It doesn't contain the foreign policy axis (and the "fiscally liberal/conservative" is named "economic left/right", which is less ambiguous than "liberal/conservative").

Some people also include a different "politically authoritarian/libertarian" axis, different from the "socially authoritarian/libertarian" (which does make sense, for example Cuba nowadays is very liberal socially speaking, but not so much politically speaking), but the Compass doesn't, it keeps it simple down to two axis.