Satoshi didn't have a 1MB limit in it.
Are you saying that the original plan was to have no limit at all? What would happen if we were just to remove the limit now, instead of making it bigger?
The limit wasn't part of Satoshi's original plan, but keep in mind that the original plan was at that time very much a work in progress. I was only involved for about a month back then. When Hal and Satoshi started talking about involving more people, I dropped it.