Guys
Can't you see the reason for DEC? It is not to deliberately "screw" anyone. It is simple mathematics. If you only hire FOs you reduce the number of possible applicants by at least 50%.
They will continue to upgrade within as fast as they can but with the number of aircraft coming they must find more pilots to fill these seats.
Will they lose FO applicants? Hardly, it is still the fastest way to a wide body command and the applicants know this.