I'm still watching The Waltons for the first time and am now on season 7. I keep feeling like I've missed something, but when I check the episode order, I see that no episode was skipped.
John Boy's original run had a strange ending. He went to New York for his manuscript to sell and liked the city so much that he stayed there. The daily newspaper, which was so important to him, was never mentioned again.
Only when Grandma returned home did we find out that she had had a stroke. Before that, she had been in the hospital without the viewer knowing any details. It was nice that the grandparents had one last episode together, because in the next episode Grandpa suddenly died. The viewer didn't find out what happened. The grief wasn't really dealt with either, everyone seemed to want to live on for Grandpa, which is strange because in the first seasons every little thing could turn into a drama. When family goat Myrtle was in danger, some of the children almost lost their minds, but when things got really dramatic with the grandparents, everyone was brave.
Mary Ellen spontaneously married a man she had only recently met. As a viewer, however, you don't see much of her big love story; instead, her husband, a doctor, is drafted into the army, so Mary Ellen moves back to the Waltons. Is the news that came in one of the last episodes I watched, that Curtis had been transferred to Pearl Harbor, a bad omen? Could Mary Ellen become a widow?
It gets extremely strange in season 7 when Elizabeth is haunted by a poltergeist. Since the viewer saw the haunting, I was actually curious to see how the episode would be resolved, but there was no rational explanation at all. Elizabeth ordered the poltergeist to disappear and he disappeared.