With the introduction of digging in Patch 8, the age-old (as in, from the beginning of the EA till now) problem has gained a whole new dimension to it - seeing how whenever a skill check is made we have an accompanying notification whether it succeeds or not, any sense of secrecy there is to the buried chests just goes out the window - even if your entire party fails the Perception check, you can just use the shovel on the ground where you think the chest is buried and unearth it regardless.
So there is, again, a good enough reason to consider only leaving the notification when you succeed at the check or only save it for the checks that have a significant failure result (such as your characters having a different line of dialogue when, say, failing to identify the mushrooms in the Underdark) - or make it a toggle so that those who want to keep them around can have them, but otherwise they can be turned off at the player's discretion.
