You might be right. I've developed a strong appreciation for the actors through interviews and behind the scenes footage - Bradley and Colin even took this roadtrip in search of the truth about Arthurian myth and it made me all aww. But you're right about that not translating well on screen. Part of it is the writers' fault, I think, for being so chronically unable to commit to a storyline. Part of it is also the nature of the myth - the version I know had Morgana carrying Arthur's baby (Mordred) - which doesn't always lend itself to a kids' show. They're trying to keep it clean while keeping it serious and they're kind of... failing.