Whether lenient or not, that's the rule agreed upon by the owners and players. I'm not a Pats fan. In fact, I hate the Pats (not as much as the Ravens, Cowboys and Seahawks, but I still hate them). So to assess the same penalty as steroid use seems a bit strange. And remember, Brady's offense wasn't deflating the balls. It was primarily obstructing the investigation by not turning over his cell phone.
IINM, the Wells report concluded Brady was probably guilty. In the U.S. legal system, guilt has to be determined beyond a reasonable doubt. The NFL should, but doesn't follow the same requirements - especially because Goodell gets to act as judge, jury and executioner. I think ANY penalty handed down by Goodell should be voided. It is inherently wrong that he gets to assess all penalties and then handle the appeals of those same decisions.