This show has been going in a downward slope this entire season, and this last episode was a good example of it. Morgana has to be one of the worst developed villains I have had the privilege of being witness too. You`re telling me the girl that used to be unable to watch knights be hurt in duels has now openly slaughtered innocent civilians? One year with Morgause turned her into a ruthless and remorseless person that kills without a second thought? We're supposed to believe a few weeks/months of loneliness and self loathing turned this woman who has been taught her entire life to be humane into what we saw this season? I can understand the ruthless need to kill Uther, he deserved it, but everyone else? Why? Oh wait, the writers for this show did what they always do with questions like this, they avoided them. Merlin asks why she's doing it and Morgana tells him to "shut up". Uther asks the same in this episode and her retort was sound in how Uther had no right to question her methods, but how can she live with herself or feel no remorse for the things she has done? Uther lost his wife to magic and couldn't blame himself for being the cause, so he blamed magic and took out his rage on magic (actually well developed), but Morgana? Self loathing and loneliness for a few weeks, really?! They didn't even show a hint of regret or reluctance for her attempts to kill Arthur for the entire season, her half-brother and a person that has always been very good to her.
Morgana had so much potential to be a great villain if they actually spent the time to develop her and realize that villains don't need to just be evil, they can have depth to their character. Her emotional connection to Merlin was lacking to be honest, they were never the greatest of friends, especially in comparison to her relationship with Gwen and Arthur, which makes her being the main villain even worse. They had a chance to develop a deeper connection in the second season, but they rushed the plot like they have been doing since season one. I was hoping this final episode would develop plot threads that could show hope for the next season, but that obviously isn't happening. Why not have Morgana see Merlin toss her sister across the room rather than just running into the room after everything happens? Now we basically end this season the same as last, Morgana has disappeared and the king is mentally damaged. Could you imagine the betrayal she'd feel after finding out that she was never alone with her magical abilities and the one person that apparently wanted to help her was the one that could have ended her loneliness? Why not ever develop the guilt Merlin should feel for Morgana betraying everyone? Her supposed (poorly done) reasoning was loneliness and self-loathing, but Merlin could have taught her magic is actually good and that she doesn't have to hate herself, and that she wasn't alone. Instead we get Merlin acting righteous and agreeing with the dragon about Morgana, even though he was selfish and didn't try to help her when he had the chance because he wanted to keep his secret. He even had an opportunity at the beginning of this season to help her turn back to their side, but again he kept his secret because he was worried about himself. How about showing in the finale that Morgana still had some good in her and there was a chance at redemption in some capacity? She's just become a generic villain that had tons of potential with all her emotional connections to characters and the connection to the audience, but the writers completely failed in utilizing it properly.
Then there's Merlin and his secret that not even the villains are allowed to know about apparently. We'll get another season of Merlin hiding behind corners with his entire face sticking out and eyes glowing, then acting like he did nothing. There's also the good old 20 people in the room fighting and Merlin somehow getting away with using magic. The writers need to stop using his secret as a plot device, it's no longer "I hope Merlin doesn't get found out", but "I want Merlin to be caught". It's time a reoccurring character found out about his abilities other than Gaius. Lets not even discuss the MASSIVE plot hole of Gaius sneaking into the castle and appearing from behind the pillar in a room that was supposedly guarded by ten immortal warriors.