In the close-in air defense role, you are of course correct... Although a large ship such as this could mount several VLS batteries, providing a much more extensive anti-air defense umbrella that could encompass the entire group. I am referring to the Standard series of SAMs used by the USN of course. The VLS also provides an ASW capability in the RUM-39 VLASROC weapon, and a heavy SSM attack with the Tomahawk B SSM. Harpoon would be mounted for a lighter SSM capability, the design is large enough to carry at least four Harpoon quad-launchers.
But, I was really on a different page. A large ship is the best platform for ship-to-shore amphibious fire support ( The new 155mm Advanced Gun System/Naval ATACMS ) and offensive strike capability ( Land Attack Tomahawk/Naval ATACMS ) These are the much needed roles that are sorely missed with decommissioning of the Iowa class BB's.
The VTOL carrier deck with a fleet of two squadrons (24 planes) of JSF, and\or a similar number of UCAV's, a squadron of UAV's, a squadron ASW/minesweeping helo's, a squadron of SPECOPS helos, and a squadron of attack helo's would provide an excellent light multi-role carrier platform for air defense, attack/strike/interdiction, reconaissance/AWACS/electronic warfare, special operations, anti-submarine warfare, etc.
This should be more than enough platforms/firepower to assist the MEU at sea and ashore until the USN's heavier assets arrive on the scene to mop up if needed.