Supposedly there were scenes that were missing textures and live actor's hands that hadn't been CGed over. I'm sure contractually, the effects houses are obligated to deliver finished scenes if they want to be paid. It isn't a big deal to just cut them in and then do a refresh on the digital file being projected in theaters. I don't think they're trying to "fix" it through recutting. Just patch the holes that weren't complete for the launch date.