While I agree that it's a problem in general, it becomes more obvious with women.
Robbie Thompson introduced a lesbian and a deaf woman. Then the same writing duo wrote the episodes that killed both of them off in an anti-climactic fashion that was done for no other reason than to give the brothers more angst. That's a problem.
And they were pushing the connection between her and Sam, yet we barely got to see it. And then she didn't even get a single line of dialogue. Just a random death. It was badly done.
There is a problem with the way women are treated on this show overall. Misha Collins himself called it out at a convention once.
Well we see Jody next week, so she's alive.
For now.