I believe they are limited to the needs of the company. That should slow down displacements they will cause for at least a year.
Negative. Your belief is incorrect for MIL LV returnees. They go wherever their seniority will hold. (A free move, per se.)
Buzzpat can probably answer the FUR returnee rights more accurately, but "I believe" they also retain their rights to their seniority number & whatever that allows them to hold at the company.
GJ