The user wants to correct an address. The wrong address is displayed on the left and the user can enter or correct the address on the right in the address form.
The addresses belong to rejected mail. In several different ways (phone, email etc.) the users figure out the correct address and enter it in the form. (I would rather not discuss this topic, I tried to simplify and focus the question.) They receive several of these tasks in their inbox each day and need to complete them the same day if possible.
The developers added a preview of the corrected address below the original address. On the one hand I see that provides a better overview than the input form. On the other hand it also causes more clutter and disrupts the input flow. Even if the preview is for example displayed above or below the save button I think there is a lot of redundancy.
To add or not to add this feature?