#3 Cena stays out of the title picture
After making history at the Royal Rumble, John Cena put Bray Wyatt over twice in the space of a few days. Many have always used Cena's constant presence in the title scene as a reason to discredit his greatness.
Now the WWE has taken him out of the title picture and people are still complaining, what more do you want?
A WWE Hall of Famer isn't a John Cena fan. More details HERE
This tag team match allows the face that runs the place to not only shine more light on the Miz but to keep the title picture fresh. Cena being in a prominent match on the card without the title still allows sufficient attention for the title match.
Perhaps further down the line after Cena comes back from his movie filming, he'll hopefully inject some great star power into the WWE Championship.