I was playing Gambit as a Feminine Warlock (who had sided with the Vanguard during the loyalty quest), and when spawning into the arena Drifter called the Guardian Brother, instead of Sister like he did before the update. This doesn't happen for all voice lines. It is progressive that the guardians are feminine/masculine now, however a lot of people were happy that Drifter called the guardian by the character gender, myself included. I'm unsure if this change was caused by the change to gender descriptions or if there was something I needed to toggle now. I would send a video for proof, however I didn't think to record the dialogue at the time.