Following the rumours and much discussion on other threads about the possible changes, these have now been put into effect.
If you cancel a reservation for which you have FPs booked, those FPs will be cancelled. You will have two days to rebook in order to keep them.
If you move offsite, you will no longer have a rolling 60 day window. You will need to wait until the 30 day mark to book those offsite FPs.
So basically what we expected, with the added riling window loophole closed. Just implemented a few weeks later than rumoured.