I think the main idea behind the trade idea was that what the Pacers are lacking right now is a guy they can give the ball to and say "we need a basket right now -- get a basket."
They're lacking an offensive focal point, in particular they lack a single player who's a talented passer/creator for others. They have quite a few players who can score.
They don't need an outright scorer like Monta as much as they need a better PG or wing who can distribute.