We have a client who runs a course every two weeks with two different timeslots. Currently, it looks like we have to enter these date and time ranges manually (that's 52 entries per year for 1 course alone).
Having a function where availability can be set to only start (for example) every second Monday would be amazing. Automation is the future.
Also while you're in there, having a duplicate button for ranges would also make things a lot quicker and easier.