Originally Posted by theNomad
They're not exclusive 'Specializations', everyone will be able to unlock them as their Halo 4 career progresses
It doesn't say they're exclusive, it says Early Access. At launch only 2 of the 8 specializations will be available for people who don't buy the LE. The other 6 (which the LE gives Early Access to) will be made available to non LE buyers later. They won't be unlocked by progression, they'll be unlocked by 343i at times of their choosing.