What I mean by that is that during the early seasons, they were there to offer a great contrast, which made them compelling in the first place. In other words, despite being in a “controversial” interracial marriage, Tom and Helen were so loving and understanding of each other compared to the cantankerous George and Louise.

But after Season 7 (https://jacksonupperco.com/2015/12/15/the-eight-best-the-jeffersons-episodes-of-season-seven/) (1980-81), didn't seem like Tom reduced to being something of a bumbling glutton that George always pushed around? And was Helen for the most part, reduced to being a nag for laughs?

What I mean by that is that during the early seasons, they were there to offer a great contrast, which made them compelling in the first place. In other words, despite being in a “controversial” interracial marriage, Tom and Helen were so loving and understanding of each other compared to the cantankerous George and Louise.

But after Season 7 (https://jacksonupperco.com/2015/12/15/the-eight-best-the-jeffersons-episodes-of-season-seven/) (1980-81), didn't seem like Tom reduced to being something of a bumbling glutton that George always pushed around? And was Helen for the most part, reduced to being a nag for laughs?

It always seemed to me this was around the time Roxie Roker was having marital issues with her husband. I think she may have wanted to stop the ‘perfect lovey dovey Helen-Tom relationship. She wanted to show like any couple interracial relationships have problems too!

No. They did not become useless. I thought they got better and better.

The shift you noticed is largely due to the show’s transition from a socially-conscious satire to a broad slapstick sitcom in its final years. Once the show moved past its initial "controversial" premise, the writers struggled to find conflict for the Willises, leading to the "useless" feeling you're describing.

Here is how the dynamic shifted after Season 7:

The Loss of the "Interracial Contrast": In the early years, Tom and Helen’s marriage was a radical statement of love and patience. However, once George and Tom became genuine friends (per Sherman Hemsley's request to stop using racial slurs), the main source of high-stakes tension vanished.

Tom’s Descent into the "Bumbling Sidekick": Without the intellectual barrier between them, Tom was repurposed into George’s unwilling partner-in-crime. He became a comic foil defined by his clumsiness, weight, and inability to hold his liquor rather than his success as a publisher.

Helen as the "Fun-Police": Because Tom was rewritten as a "bumbling child," Helen was forced into the role of the overbearing mother-figure. Instead of being the elegant voice of reason, her character became primarily about scolding Tom or engaging in petty rivalries with Louise over things like the Help Center newsletter.

The "Lionel and Jenny" Factor: A major reason they felt useless is that their children—the primary link between the two families—were largely written out by Season 8. Without the "Willis/Jefferson" family merger at the center of the plot, the Willises were just neighbors who stayed over too long for dinner.

Stereotypical Gender Tropes: By 1982, episodes like "My Wife, I Think I'll Keep Her" relied on tired chauvinist vs. nag tropes, with Louise and Helen teaming up against their "idiot" husbands, stripping the couples of their unique early-season identity.

Do you think the show should have moved the Willises out after Lionel and Jenny's marriage hit the rocks, or was their friendship with the Jeffersons the only thing keeping the show grounded?

The shift you noticed is largely due to the show’s transition from a socially-conscious satire to a broad slapstick sitcom in its final years. Once the show moved past its initial "controversial" premise, the writers struggled to find conflict for the Willises, leading to the "useless" feeling you're describing.

Here is how the dynamic shifted after Season 7:

The Loss of the "Interracial Contrast": In the early years, Tom and Helen’s marriage was a radical statement of love and patience. However, once George and Tom became genuine friends (per Sherman Hemsley's request to stop using racial slurs), the main source of high-stakes tension vanished.

Tom’s Descent into the "Bumbling Sidekick": Without the intellectual barrier between them, Tom was repurposed into George’s unwilling partner-in-crime. He became a comic foil defined by his clumsiness, weight, and inability to hold his liquor rather than his success as a publisher.

Helen as the "Fun-Police": Because Tom was rewritten as a "bumbling child," Helen was forced into the role of the overbearing mother-figure. Instead of being the elegant voice of reason, her character became primarily about scolding Tom or engaging in petty rivalries with Louise over things like the Help Center newsletter.

The "Lionel and Jenny" Factor: A major reason they felt useless is that their children—the primary link between the two families—were largely written out by Season 8. Without the "Willis/Jefferson" family merger at the center of the plot, the Willises were just neighbors who stayed over too long for dinner.

Stereotypical Gender Tropes: By 1982, episodes like "My Wife, I Think I'll Keep Her" relied on tired chauvinist vs. nag tropes, with Louise and Helen teaming up against their "idiot" husbands, stripping the couples of their unique early-season identity.

Do you think the show should have moved the Willises out after Lionel and Jenny's marriage hit the rocks, or was their friendship with the Jeffersons the only thing keeping the show grounded?

It should have been a spinoff with Lionel and Jenny and jessica instead of Florence

Yes I agree,would have been better at that point!