Most shows (Grey's Anatomy included) become a little stale after each season but PP becomes more interesting each season. After an almost perfect fourth season, PP's fifth season was flawless besides a thing or two (HINT: AddiSam). With rumors that the next 13 episode season will be the last, Shonda needs to give characters some closure.
Addison continued her struggle between the men in her life. Her heart and head are never in the same place. She keeps giving Sam a chance but the viewers, myself included just don't feel it. Sam and Addison don't want the same things. Addison's journey to have a baby was beautiful and she finally got what she wanted. She should choose Jake and be happy with him and baby Henry.
Sam should just leave the practice and find happiness elsewhere. His character has become irritating. His story arc with his bipolar sister was excellently written and acted but the finale once again made me dislike Sam.
Pete & Violet: OH MY GOD! They made Pete annoying, the viewer is turned off by him every time he argues with Violet. Violet, too has not done anything worth mentioning this season besides hooking up with a paramedic. Now that Tim Daly has been fired from the show, hopefully Violet divorces Pete and just concentrates on raising Lucas.
Sheldon once again was hugely underused, Brian Benben is a terrific actor. Hopefully he is well used next season. A hookup with Amelia would not hurt.
Amelia was the star this season. Her story arcs were beautifully heartbreaking this season. From her drug addiction to her donating her brainless baby's organs, she was a rockstar. Caterina Scorsone deserves an Emmy!
CharCoop: The most loveable characters on the show. As opposite of what I initially thought, I grew to love Erica and Mason as characters. Shonda really knows how play with heart strings. Erica's death brought me to tears. Mason is a great addition to the show. Charlotte has grown so much, I just love her. Here's hoping for a CharCoop baby next season.
Jake's back story, the dead drug addict wife was nice and his chemistry with Addie is hot.
CharCoop (Mason/Erica), Amelia's addiction and Addison's baby hunt were the the primary focus of this season and thank God for that.
If the next season is really the last, I hope Naomi returns for a few episodes.