I personally prefer a thin skid plate such as the DE if I choose to use one. I am testing out an aluminum skid on my sct410, and so far have no noticeable negative effects. The down low weight made the car easier to level out during nose down situations as well.
Depending on the car you run this may not be the same story for you however. Some cars might just naturally like to be slappy, and need all that up travel in order to jump properly etc.
Besides I think there is something in a lot of us that makes us want to preserve that stupid anodizing on the bottom of our chassis
