Why are you so sure of this? Eaton had 11 wins to Sheet's 12 last year, and I can almost promise you he'll get more than 12 this year. The team has nowhere to go but up. I'm not saying that there's no way Eaton won't win more, but there really isn't a great precedent saying he will. In fact there's no precedent at all.
What is so impressive about Sheets is that he is one of few that pitches at a hitter's park. He should have more support this season and if their young corp of players like Weeks, Fielder, Hardy become what they are supposed to, the Brewers should be pretty fun to watch in 05 and 06.
One thing that bothers me is that they traded their closer AND set up man.
As far as Eaton goes, I don't think he is near the talent Sheets is but I predict he will post an ERA around 3.50 with a very good WHIP and plenty of Ws and Ks.
"Think of how stupid the average person is, and realize half of them are stupider than that." ~George Carlin