I heard somewhere that Greggs was supposed to die, originally, but the higher-ups overuled this. That would make sense if true - some of the scenes right after she's shot would basically play the same way if she had died.

But that would mean it was the second time in one season that they had a Bury Your Gays plot, so, yeah, good that they didn't.

Also, I really like Greggs, so I'm glad we got 4 more seasons of her!