However, I am totally against any form of having Hayden as the Anakin ghost. Say what you will about "looking how you want to," it doesn't make any sense, because Luke wouldn't--shouldn't--recognize Hayden. Shaw is the only form of Anakin he saw, and if only for that reason, Anakin would appear as he did just before he died. I say go with Shaw as the ghost.
However, I am totally against any form of having Hayden as the Anakin ghost. Say what you will about "looking how you want to," it doesn't make any sense, because Luke wouldn't--shouldn't--recognize Hayden. Shaw is the only form of Anakin he saw, and if only for that reason, Anakin would appear as he did just before he died. I say go with Shaw as the ghost.