Keith,
Personally, I think the idea of a rotating daily area that offers a higher CXP reward is perfect. As you stated, it will prevent other areas of the game from being ignored, it will prevent players from "burning out", and it make sure it is different so we are not running the same daily area until our eyes bleed.
It would be nice to see if you could rotate it on a daily basis. Similar to the daily Operations.
Looking forward to see what you guys come up with.