I'll probably watch the series to the end too because I'm a bit of a completionist. Between seasons I miss the characters and the show but then I watch the latest season and it's not the same. It's not as good and I get bored.
I do miss Mallory. She was one of those characters thst always said what needed to be said or would say what other characters wouldn't.
Amy has kinda aged out so they need a young character to carry it on. For a while that was Georgie. Katie could fill that role too.
And I'm with you on Lou. The best she's ever been is tolerable. I've never truly liked the character.
This show really does need to wrap it up but I guess as long as it keeps getting ratings, they'll keep renewing it.