DGCA
Well, it isn't 'Jet' who should be hoping to get Cat 1 back, its the DGCA. With the current concerns at EASA as well, this still could be a long process. The international policy office in D.C. is staffed with some very competent experts. They leave no stones unturned.
The return to Cat 1 will happen when all things 'safety' can be assured.