I think the sailboat blocks look fine. I see some excess fabric in the area at the bottom of the picture where there isn't any quilting. I'm sure it is because your batting shrunk. The boat blocks have more quilting in them and that helped stabilize the batting and controlled the shrinkage. I think if there had been more quilting in the bigger areas, it would have helped.
However, it is an adorable quilt and I don't think it looks bad at all!!!