Deandre can easily be marketed towards R&B/Neo-soul crowd. Urban AC will eat up his songs, and he will slowly but surely gain an audience in that realm.
They'll likely use their save on him if he is the one. They've been trying to make him happen for weeks, but if he is saved it won't do anything but prolong the inevitable.
I'm not shading Jesus. What I'm saying is... how often do you hear Christian music on the radio? Very rarely. It's pretty clear that Colton wants to do the Lifehouse sort of thing.