Currently, the email subject line for batch emails is along the lines of "Items were moved to [folder]". Within the email, it will surface some specific examples, but at a certain number of items, the bottom has a small gray text link that says "[number] additional items. Click View All to view."

It would be helpful for users who rely on these notifications as part of their workflow to be able to easily see how many actions are accounted for in each batch notification, perhaps in the subject line or elsewhere.