I don't have Morton in our 18, but I can understand the thinking of those that do. On talent alone, he'd be in our top 10, and his inability to get a game at the Tigers was due to more than just playing ability. He wasn't happy, the coaches weren't happy with him, it just wasn't working. If the Swans have targeted him, it suggests that the coaches are probably willing to give him a fair go at it.
For comparison, Rhyce Shaw was in and out of a fairly meh Collingwood side, and we got him for a downgrade of pick 46 to pick 61, which is worth not much more than pick 79. He was into our best 22 immediately and came 2nd in the B&F.
Similarly, Teddy was in and out of a crappy Essendon side. We traded for him and he played 23 games when in 2006 when we were the reigning premiers.