Another similarity is Hamlet was betrayed by his best friend (hence Opie and Jax.)
Not sure who you're thinking of here, I don't remember Hamlet being betrayed by anyone. Horatio was Hamlet's best friend, and he didn't betray him. In fact, he tried to drink the poison intended for Hamlet, loyal to Hamlet till the end.
Oh and another similarity is Hamlet was haunted by his fathers ghost hence Jax being influenced by John from beyond the grave.
Yeah, that goes along with the starting point. They obviously based it on Hamlet, Claudius=Clay, Gertrude=Gemma, it's right there in the names. But Jackson (Jax) doesn't resemble Hamlet, so that's our first tip-off that this isn't your average Hamlet. I'd say we can expect Clay and Gemma to play their roles, but Jax isn't going to play the role of Hamlet, he's expressed no desire to kill Clay, that's not going to allow him to take over the club.
I'm arguing that while we can expect Jax to kill Clay. . . the hook is, that's what we expect, that's the story of Hamlet. Good TV does the last thing you expect. I think they're going to build the feud up between Jax and Clay so much that it gets beyond the breaking point, and some crazy thing is going to happen that comes out of left field, say Weston loses it and kills Clay.
Think about it, like in The Shield, you expected Vic to kill Shane, but it never happened, it builds the tension.
Say, Tara's about to rat, and Clay kills her, Jax goes to confront Clay, Clay kills Jax, and then Gemma kills Clay, they could still do the Hamlet story, but the twist is the roles are reversed, everyone dies except Opie.