It would be great to manage ‘out of office’ notifications on your iOS device.
From a business customers perspective, this would be another incremental feature that enhances the functionality for those using their iPhones and iPads for corporate work.
For the average consumer, this would be a handy setting to have, even on iCloud email accounts. Maybe you are traveling internationally, or just turning your device off for the weekend- either way, it would be a convenient addition to iOS.