Re: Biggest gap between on-screen and literature in terms of appearanc
I dunno, it didn't seem like McCoy had all that much conscious access to Spock's memories. The way TSFS made it look to me, he had random memories drift to the surface and overpower his own mind every so often, but it didn't seem like the sort of thing where McCoy suddenly knew everything that Spock knew.
Sybok hadn't been a part of his life for decades. The family had completely disowned him, so officially he no longer counted as a member of Spock's family. He was just a distant memory from Spock's childhood, not relevant to his life. And he was a family embarrassment, a crazy cult leader. I don't see why Spock would have wanted to bring him up until it became necessary. Heck, even when it did become relevant, Spock was reluctant to come clean about his relationship to Sybok. We know from long experience that it's not easy for Spock to talk about his personal issues, especially embarrassing ones (e.g. pon farr).
I can buy Spock not talking about Sybok. I find it less believable that Sybok was completely unknown to Kirk & McCoy when Spock basically downloaded his consciousness into one of them. You wouldn't think that they'd have many secrets left from each other after something like that.
I dunno, it didn't seem like McCoy had all that much conscious access to Spock's memories. The way TSFS made it look to me, he had random memories drift to the surface and overpower his own mind every so often, but it didn't seem like the sort of thing where McCoy suddenly knew everything that Spock knew.