I mostly agree. I'm only quoting the ones I'm more doubtful about.
Monk: Martial Controller. We know it's not Striker, and no class could be more martial. Give him lost of throws, grapples, stunning attacks, nerve strikes, trips, etc. and he's the guy in charge of who's doing what where on the battlefield.
How do we know it's not striker? IIRC, the races & classes book, or one of the designers, said that with the monk's emphasis on fast movement it's an archetypal striker.
Barbarian: Primal Striker. Someone needs to be based off the same power source as Druids and Barbarians are a natural first choice. I can see this class getting a ton of HP and some kind of shrug-off-status-effects ability to compensate for poor defenses.
My money's on Primal Defender. Strikers are supposed to be fragile, relying on movement to stay safe, and they deal damage to single targets. Barbarians, archetypally, wade into the fray, attacking hordes of opponents as easily as a single tough opponent.
Druid: Primal Controller. Shapeshifting, summoning, healing, and utility nature magic is way too much to be all given to one class. With iconic spells like Entangle, Stone Shape, and carefully chosen summonings, the Druid would make a great controller--and perfect for an underrepresented role. Healing and major combat shapeshifting would probably have to go to another class.
The races & classes book said that 4e druid powers will focus on shapeshifting. I have no idea what role they will be. The problem is that 3e druids are controllers, leaders, and defenders all in one. My guess is that they'll either be
Illusionist/Enchanter/Beguiler: Arcane Controller. The demand for illusionists is going to be high and the beguiler class worked pretty well. Oddly enough, despite the same power source/role as the Wizard, this should be very easy to differentiate. The abilities would be focused on charm/compulsion/misdirection, thwarting enemy attacks through deception and trickery rather than physical barriers like the wizard throws down.
Someone said somewhere that the illusionist and necromancer will be of the Shadow power source. Or maybe it was in the worlds book that that was written.
Shaman: Primal Leader. Think of the 3E druid as a pure spellcaster: healing, buffing, throwing down lightning and fire, maybe a summon or two. There have been no hints at the existence of this class but I think it would work well.
I would love that, as long as they created some new interesting, spirit-related flavor for it. The OA shaman was a tweaked cleric, and the spirit shaman was a tweaked druid.
Favored Soul: Divine Striker.
I don't think this should be its own class. IMO it's crying out to be a paragon path.
Shugenja: Divine Striker. If they decide to go for an eastern flavor, this divine elementalist could work like a holy warlock.
Could be. It could also be a primal leader, or even a controller.
Sorcerer: Arcane Striker? I have no idea how to differentiate this class from the wizard and warlock.
I wouldn't be surprised if it was another arcane controller, or a primal controller. The races & classes book had some interesting ideas about how to make it distinctive.