Sagan will have at least one star for the rest of his carrier for any north classic, even out of his shape. For a "just in case" reason. And don't forget how Gilbert won his P-R and Ronde. If the stars align right, even off form Sagan can jump to the correct long range attack.These ratings are designed to have one from each team represented.
To me, there are 4 Jumbo riders who deserve a higher rating than Sagan.