M"gann going back to Mars, a not so smart move by the shows writers to write her out of the show.
Oh, I don't know about that personally. Maybe now they can focus a little more on Kara, 'cause you know, its her show
Hopefully they will start writing out the Guardian/Winn stuff, Alex/Maggie and even Mon-El and focus on Lena/Lillian Luthor and Geremiah/Project Cademus (you know, what they should have been doing)
We'll see how it plays out.
I wasn't against the idea of M'Gann being written out. I though the idea of sending her back to Mars was stupid, back to the others who want to kill her. Fleeing to another planet other than Mars would have made more sense.