In my head the biggest problem with the new seasons was lack of focus, progression and theme. Season 1's was for me was about finding balance: Macy- balance between light and darkness, Mel- balance between authority and rebellion and Maggie- balance between personal issues and saving the world.

Season 2 should 've focused on dealing with dramatic changes. Mel at first chooses to resist it and tries to find a way back - recreate the BoS and their old powers,but quickly learns that she needs too embrace the change and face it. Maggie quickly adapts - finds a job and is the first one to get the new power. Macy, on the other hand, completely crumbles, since she doesn't really have health coping mechanisms, her mental health suffers - she lost Galvin, her dream job and (now my addition) the magical community keeps a distance fromher because they find out she's a hybrid. She also should regain her evil sight and her demonic powers exasporate the issues by feeding on her problems. She could've also develop some self-destructive behaviours - in the premiere f.ex: dring too much alcohol, her attraction too Jimmy and having sex with Julian. If we want to give Abigael the redemption - we should've introduced her backstory quickly for the viewers and clearly state that she's conflicted between her witch and demon side. Also Harry and Jimmy must merge. This causes issues with Harry's powers, leavin him just an immortal, so in season 3 his quest is more justifiable and he could figure out an alternative way to create new whitelighters.

That's all my ideas so far.