It would be great to be able to reschedule appointments to time spots that conflict with the booking page's availability options.
Example:
I closed one of my booking types to additional bookings this week.
Someone already had a booking for that booking type this week and tried to reschedule for the same day.
Based on the booking settings, this was not possible.
She reached out to me to manually look for a time. I decided to accept one of her alternative availabilities, but couldn't rebook it myself due to the booking availability settings.
I ended up cancelling the TidyCal booking and sending a manual meeting invite.
This workaround is fine, but at some point may skew the stats that TidyCal captures, rendering them less useful.