If it fills a need for you, I don't see an issue here. It all really depends on how Dunn's season plays out. If it's bad to moderate, you'll be seen to have the advantage. If it's a great turnaround, you'll be seen to be the loser.
So, that said, you get a great closer in Wilson and a potentially very valuable pitcher in Britton. If it fills a need, go for it. If you're going on value, then it's iffy.Help on mine?