If you want the Brewers to be competitive every year, I'm assuming you're including this season. In the history of the franchise this is one of the most competitive seasons they've had, warts and all to date. So why would they "sell", as that term is generally used? Now, if they could find a way to make a daring move that would help them both now AND in the future, it may be worth considering. But even then you risk so much in terms of disrupting the team as currently constructed that a move gone bad, even if well thought-out, would bring a lot of questions simply because it went against the conventional wisdom.