Please tell me snapshot monitoring hasn't gone away...
It has NOT.
Moreover, with Veeam ONE v6 you now have "Snapshot age" alarm which helps monitor forgotten snapshots that are consuming valuable space on your storage.
Go ahead and check out our updated Summary views. See "Latest Alarms" section - it represents a summary on the most recent problems that occurred within your environment. An addition to that, you may also consider using "Alarms by Object" section which gives an overview of the most problematic virtual infrastructure objects at any given virtual infrastructure level. Thus, none of top snapshot users will pass