I set the image size to be 1200 x 400 instead of 600 x 200. Then checked featured post. And 2 columns. This in effect made the featured post 1200 x 400 and the rest 600 x 200.
Visually it works great. My question at this point, is does the larger image size setting increase the overall size of the page or is this an effective way to accomplish what I was after with out making any changes to the plugin.