Yes I have talked to the haXe devs in the mailing list, but they have the same opinion as me, CC isn't really suitable as a software license and using it for software shouldn't be encouraged in anyway.
About consistency of the licensing, what about changing to dual license? Say users can choose between CC or MIT. In that case individual ports can choose to update their license or stay in the current state if no one has the time to do it soon.
But in anyway this is a task that should be done sooner or later, well, if PureMVC is still being used in the future.