So... How could the NFL change their silly drug policy and still save face? Maybe if one of their players sued them over it...
It's a collectively bargained policy. The NFL doesn't have the ability to make unilateral changes to it.
If the policy ends up changed, it's probably a good bet that the league making concessions on testing for recreational drugs will be matched by the NFLPA making concessions somewhere else. Like on HGH testing.
I suppose if it was the league's priority to save face they could then blame the players. I'd hope it wouldn't come to that. Both sides are too combative as it is considering that both owners and players are fat cats with the current state of the NFL.