There's disagreement among different rumor sources about whether the episodes have been restored already, and if they have, by whom.
We're not really at a point yet where people perceive downloads, cloud storage, etc. as a permanent form of ownership, so for many the iTunes versions will be an immediate viewing opportunity rather than a part of the collection. And Doctor Who
fans in particular like their extras; that's why the show has more bonus material per episode than virtually any other series, which wouldn't be the case if it weren't demonstrably profitable in the long run.