IMHO the CTA really "buried the lead" in its online explanation. The fact that the Red Line will still run, albeit on the Green Line tracks between Roosevelt and Ashland/63rd, is huge. Unfortunately, the CTA explanation doesn't address that until well down the page, and even then doesn't really highlight it.
That means no changing trains from the Red Line to the Green Line going to or from games. For Sox fans, the change really just means having to walk three additional blocks to and from The Cell. The closures of the tracks will really stink for those who use the closed stations daily, but it shouldn't be a big deal for Sox fans.