If we judge the success of legislation by how well it meets its intended purposes (and if we assume that the stated purposes of the drafters is the intended purpose), then this legislation fails. It gets it wrong on two counts, if their intended purpose (as stated by Schumacher) is to restrict cheap 40s, but not affect the craft brew industry.
1) It bans certain craft beverages from Sierra Nevada, Boston Beer Company, New Belgium, and perhaps in the near future Bells, because these breweries do not count as microbreweries as defined by the draft.
2) It fails to ban cheap 40s from Molson, Labatts, and Axehead, as the producers of these beverages are Canadian, and thus imports.
One might argue that Sam Adams Boston Lager is not a craft brew, but Sam Adams Utopias is. This legislation will prohibit the latter from being sold in Madison.