First of all, people are coming back to Jordan!
In fact it looks as if there will be a LOT of people around in Easter week, and probably throughout April.
Royal Jordanian report that flights are full with long waiting lists for March and April.
The big hotels are full - these are the ones that take most of the groups, and it would probably be a good idea not to wait until the very last minute to choose your hotels. If you are a last minute person anyway, then at least start looking for a hotel sometime in the afternoon and don't wait until the evening.
As far as your personal safety in Jordan is concerned I will repeat what I have been saying for some time :