That is a great point!
Walker hasn't pushed a lot through in WI, it's more that he moderated some of the ideas coming from the republican legislature, signed the bills that made it to his desk, then acted as a lightning rod for criticism/hatred from the left. He could have pushed harder to get mining in the state, not to mention I think he completely screwed the pooch on the indian casino deal... If I were him, I would not only have gotten the casino deal done, but would have encouraged the tribe to open one in milwaukee as well if only to completely screw over and bury the potowotami scumbags.
Well, that one the indians had WI by the short-n-curlies... if one tribe vetoed a new casino, and the state went ahead, then the agreements with ALL the tribes were void, and didn't have to pay, even if the other tribes had agreed on the new casino. Doyle set that one up in a craptastic way, probably for some serious backroom deal/graft, but that his time as AG meant he knew how to structure it to leave him untouchable.
Then AFAIK, the agreements between WI and the tribes would have been in federal court for years and years. And WI would have gotten none, or a pittance of any back pay held in abeyance by the tribes.
Personally, I too would have done it for the "have a spine" and honeybadger factor alone, for the long term gains to show that the tribes can't push the state around. However, there would have been fallout for years had he done it, with significant fiscal losses for the state. While I wouldn't have done what Walker did, it was enough of a 50/50, mutually-assured-destruction, Catch-22 situation, I won't Monday Morning Quarterback him on it.
But indeed, Walker is a "good governor" but he's not the hard-as-nails take no prisoner conservative he's made out to be. He avoids shitstorms and controversy wherever he can, his skill is really more reactive, in not backing down, and the willingness to endure and not give in once the shitstorm starts.