Does faux-Locke/Esau really have all of Locke's memories, or just piecing together what he knows. Somoneone (Rchard?) asks Locke "Didn't Ben kill you"? Response: "That's what I recall", or something vague like that....where he can fake his way through being Locke, as no one who he's hanging with now really knew him (not even Sun...she didn't interact with Locke much that we saw on the show, so she might not have noticed anything more than we the viewers did).
If Locke stays dead, it's definitely a tragedy...but may be interesting as we see the big picture...
If Locke stays dead, it's definitely a tragedy...but may be interesting as we see the big picture...