i think the projector is a lot like blasters its got offence-offence option and yeah debilitator is like damage control or damage support/a corruptor(i played cors a lot more then blasters, has a great assult riffle kin cor and a rad dark some of my favs
)
and manipulator is like control/support or ranged damage.
you should have a look at the powers page on the webiste here.
then factor in some of the power set groups like ranged seem to have dozens of potential power groups slated and more then 1/2 a dozen in already
theirs a few power set combos they dont have that id like to see one day a defense ranged for a ranged tank, id also really like to see a defense support and a defense control some time but id say they are focusing on balancing the more traditional power combos before they proliferate the tank class subset and the team only subsets.
although i hope they do in time i can see why they would hold off on it like vet classes so that everyone doesnt start out a tank/something
(but i really hope one day to be able to create a super heroic (team only)defence/support tank with heals that gains aggro by healing and has never killed anyone in its life )