I don't think getting rid of the 70-200 would be a good idea, it was popular before crop sensor came along, and it'll be popular forever.
The 1D (and Ds) also don't support EF-S lenses, which are designed for a 1.6 crop, so you'd still need new glass in the normal range.
A lot of it comes down to what you shoot. Full frame has a number of advantages in image quality and noise characteristics, because the surface area of the sensor is larger. For a sports shooter, the crop factor is a good thing and outweighs the IQ and noise benefits. It's really a matter of what you shoot and how you shoot it.
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