I would expect that your zfs pool would import fine. The pool status would show that the new feature flags could be applied with pool upgrade. Once you do this, new records or filesystems created in the pool will begin to gain these properties.
If you do a zfs send to your backup machine and are sending newer properties than the backup pool supports, you might have to adjust what your zfs send command is doing.
You could test this by crafting a small temporary pool on removable media and test your backup procedure on it.