I think it's still way too early for Braun Strowman to win the title at this point. He doesn't have the experience yet (and he knows that), and if they pushed him this early, he'd become another Reigns. Speaking of which, I'm very interested in how they book that match.
But I think they've been using him well recently. I really liked his appearance in the Rumble, and was actually disappointed when he got eliminated. They've also done a good job with his character from what little I've seen from Raw.
He could be a great big guy, I just hope they don't push him before he's ready.