I think you are missing my point. The current functionality assumes the user knows to check the reminder status when moving a meeting, however they actually move it (open and reschedule or click and drag). Most users will assume that the reminder they originally set would get set on the new instance OR they would get prompted to re-apply it OR they would be prompted to edit and check the whole appointment. The truth is, if you click and drag, it takes a second and the appointment just moves, with no prompts etc. It puts the onus on the scheduler to check everything about the appointment, which in this instance makes the click and drag functionality pointless; you have to open and edit the appointment anyway to reset the reminder. And believe me, I've been invited to many appointments which have been moved and this resulted in the reminder being removed without the host being aware.
It's not intuitive and not user friendly because the app assumes that regardless of how you set up the appointment originally, the current state is exactly what you want to copy to the new time slot. People don't work/think that way.