It would be very useful in some cases to be able to access to full audit trail for each check; a list of all events from creation, updates, disable et cetera coupled with date/time and user performing it. A large environment handled by multiple users throughout the organization is very hard to follow up as is and instills a lot of uncertainty of when something changed and whom to contact to understand why.
Update: This was released in 7.9 (2015-11-24). You'll find the Journal under Tools -> Journal. There you will for example find all changes made to checks and who made the change and when.