Nice post
@Toni. Actually Ray didn't believe Wes was Jock either, so I don't know where the idea came from that he thought otherwise. I remember the scene where Miss Ellie asked Ray to deliver a message to Wes that she would meet him and Ray started trying to convince her that he wasn't Jock and to not see him. She said something to Ray long the lines of she was already having to fight with everyone else about this (since they didn't think he was Jock either) and she asked : "Do I have to fight with you too"? So Ray said no, that he'd deliver the message. He was doing it because she asked him - not because he thought Wes was Jock.
Sue Ellen told Wes not to see John Ross at school. She was angry that Wes visited John Ross at school - not how she'd be if Jock had visited John Ross. She pretended to believe he was Jock when she was around the rest of the family but only because, in her abrasive way, she was just trying to make everyone else upset.
If Jock had somehow survived, he wouldn't have taken a job as a ranch hand so he could settle for just being around his own family and getting a (small) paycheck. Jock would've walked right through the front door and said "I'm back."
This was a storyline done at a time when Dallas was changing from what had worked so well for them, into something that tried to make every storyline bigger, more outlandish and more unbelievable than the last. The Marinos storyline and Jack happening to look exactly like Dimitri Marinos was the beginning of that style and they stuck with it. They even stuck with it despite losing viewers rapidly. It seemed they were determined to do anything other than what had worked for them.