Is Derrick really that good defensively? Is Dawson really they bad defensively? I'm sure Wilson is better but not by a wide enough margin to significantly outweigh the offensive benefits you gain from Dawson. Therefore IMO there isn't a huge difference between the two and because this team has struggled so much to score, I go with the guy who gives us better offense.
As a side note, The entry pass Dawson made to Gardner (when he missed the bunny) was arguably the best post entry pass I've seen all year (not that that's saying much).