A nifty time saver would be for a quick toggle on the Vault tab to turn on & off "INCLUDE CHILDREN" setting for doing a checkout or in of an assembly. It would save 6 clicks (3 each to turn the feature on or off).
It would further save time in undoing a checkout of all the files when I've accidentally left the INCLUDE CHILDREN on and then check out the assembly. It would be a visible reminder than the setting to INCLUDE CHILDREN is on or off.