Not long, would be nice if it was earlier. But consider this is probably the first year with less than 600,000 hunters since the 1970s and in the last decade a number of years have reported upwards of 400,000 gun kills. Of course at this rate you may be below 200,000 this year for the first time in several decades, but I doubt the problem is the length of the season. As mosesdapoet , Hot Tabasco note, I think the biggest problem was the weather, and as BlueMondaySkipper notes, wolves are becoming a problem.
Wolf depredation zones now reach well into central Wisconsin, and I doubt the DNR is being conservative about their range. But there's another week for blackpowder, and has been noted earlier bow season, which I prefer, runs from mid September to early Jan, so there is plenty of opportunity.