Broadway actors nearly went on strike this week over something that didn’t really have much to do with Broadway theatre. “The road is a far less certain bet than it used to be, as evidenced by the recent decision by the producers of “Avenue Q,” the Tony Award winner for best musical this year, to opt instead for an open-ended run in Las Vegas. Each side recognized that there needed to be a new economic model. It was no great secret that the road had to be restructured. The question was how.”