Because of the A360 file cloud storage which in many instances works pretty fantastic I think at one point to prevent two people working on the same file, adding a Checked-Out Checked-In feature would be very helpful.
Idealy when I want to open a design I should see if somebody else is working on it right now, and if yes, blocking me from editing it, till the person who checked it out closed it, syncs and after finishing the sync Fusion checks-in the design making it available for others to open.