I am a big fan of this Merlin and I have always waited so much to see it. But ending of Season 5 made me so sad and disappointed. Didn't seem like Author and Merlin achieved anything. Magic was still out-law. The story was doing so friendly and feeling of a real happening in a nice way. Then it just ended like it was a dream or legend that will never come true. Even though it may be real fact, the producers didn't need to make such as sad ending.
I for one found the ending tombe very good, Merlin got to tell Arthur everything and was rewarded by acceptance from his friend, which is really all he wanted. Magic was not outlawed it is simply disappearing.