DeMayo has made it clear he's a bigger Jean fan than an Ororo fan, so it's fine if he wanted to write the Jean/Maddie centric episodes over the Ororo...
«Speaking generally, it is because of the desire of the tragic poets for the marvellous that so varied and inconsistent an account of Medea has been given out» (Diodorus Siculus, The Library of History [4.56.1])