It was a staff decision that was made after a very long discussion regarding his capabilities.
The decision was made permanent by the Bureaucrats, and Saitama was placed under Supernatural Strength instead.
The page was locked for a very long time after that. So trying to add him back is only going to lead to the page being protected once more.
Sorry, but the decision was final. He simply doesn't fit the necessary capabilities, nor is it likely that he will ever demonstrate them.
The most your going to find him doing is One Hit Kill.
Unless you want the page to be locked permanently again, its best not to try and add him back.
The highest feat Saitama has ever demonstrated is stopping a planetary destroying attack.
Users of Absolute Strength can easily break galaxies with their fists. Saitama will never show anything like that, nor would the author ever even bother to write a story like that.
All of Saitamas encounters are never going to go beyond the planet he lives on, so him demonstrating Absolute Strength is pretty much off the table.
ONE's thoughts regarding Saitama means he is never going to show beyond a certain level of strength because its simply not his writing style to do so.
So any point that says he can do this is merely hyperbole, because we all know that its never going to happen in the story.
Sorry to disappoint you. ^^;;