
The Evil Royals arc was the best storyline of the show. Too bad Prue didn't live up to it. It should've lasted up to one season instead of half an ep, with both Phoebe and Cole being pulled out. Leo spilled the beans when said "whoever kills the Source, becomes it". They should've known Cole took it
when he saved the sisters and Leo in the episode where the Source freed the Hollow.
Leo should've defended Cole, the human, as he had the knowledge of it, unlike the sisters.
Also, Phoebe should've faced the Trial for crossing over the other side and suffer more than just a temporary suspension, like in later season.
She and Cole should've been forced to prove themselves to the Elders to deserve a chance to be back to the Good side, instead of Phoebe being back to business just for the sake of being a Charmed one by blood.
The show quickly switched to Piper and Leo drama, when Phoebe and Cole case was far more deserving of action on Elders' part.
Piper and Leo did nothing THAT wrong, Phoebe on the other hand has endangered the whole Good-Evil balance by crossing over and making a child with the Source of all Evil and feeding it with a centuries of power of Good magic. She should've paid a higher price and Cole deserved a chance to be back into the family as he only became evil while saving his loved one and her family, including Leo.