Makes senses, doesn't it? We hardly know anything about him. He's only had a few lines. He has Christa and potentially a new baby to look after, and Clem.
He's an ideal character for the player to control and make decisions for.
I'm not advocating for him to be the season 2 protagonist. I'm not too fond of him as a character, but I'm saying it would make the most sense of the current cast.