Well you already have Sigma's 70-200 f/2.8 which is pretty damn good already. There isn't that big a difference between the Sigma and Canon.
This lens will give a more accurate at least at the wide end, field of view of 70-200(if they were on full frame).
I agree. Too similar a focal length. Why do they keep putting out DC lenses instead of DG which will work on more bodies? Buying a DC lens is throwing money away.


