Why was Jenna good in the series finale?

Just finished my first watch through and managed to avoid any major spoilers!!!!!(everyone clap) Anyway super random takeaway considering everything that went down during the episode, but I couldn’t help but notice that I was lowkey living for Jenna? Like first she out-bitches Alisons mini me, then she gets the ball rolling for the main group to find Spencer while Alex had her locked up. I just feel like the Jenna we all knew and hated would’ve had not a care in the world for Spencer’s wellbeing, is it just me? Maybe I’m missing something, or maybe it was just a one off little thing to give Jenna a mini redemption arc in the final moments in the show and I’m just overthinking it.