What do you think about Mai HiME plot/story

Since now more and new fans come to this forum, decide to do a question? What does everyone think about the plot and story regarding Mai HiME despite the ending? Also what changes needed to be made or just upcoming projects regarding to it.

Does HiME/Otome connected ?

What is the future/purpose of the HiME ?

Are they more than any other special types HiME's ?

Why OL created the Carnival and what his friends has to offer ?

Is the world truly gonna die ?

There's more to this than meets the eye....................