Couldn't disagree more. The three-stripe look has allowed the Packers to keep the essence of their old-school uniforms while gracefully transitioning them to modern jersey templates. I actually prefer it to the "Victory Stripes."
In contrast, the Steelers have done what you're suggesting by clinging to their giant sleeve stripes and they look worse by the year. Their stripes don't even fit on most of their players' sleeves anymore without getting cut off halfway through.
The days of durene jerseys with long sleeves are never coming back, so teams with an old-school aesthetic are either going to have to make compromises or come to terms with looking gradually worse every time there's an innovation in football uniform design.