I'll also add that if you've ever dis-assembled an old Parker or other vintage boxlock in order to clean or repair any of the internal mechanism then you'll probably appreciate the ease of removing the Lefever sideplate for access. I'm not sure if that was Uncle Dan's reason for going with this particular design, but in my opinion it creates a beautiful looking gun with function and features that are hard to argue with.
When it's all said and done, it's just a matter of taste as to what design a person likes and prefers the looks of.