Even by today’s low standards, the Milwaukee Symphony is struggling mightily at the box office and on the ledger sheet. A new management team has garnered early praise, but the coming season will represent a watershed moment for the orchestra, as it attempts to recoup recent sales losses and reconnect with the city. The desperation for a quick turnaround has led the MSO to program a season made up almost entirely of guaranteed classical hits like Beethoven’s 9th and “Carmina Burana,” to introduce “subtle theatrical elements” to the concert experience, and even to experiment with a video component. On top of all that, the orchestra is cutting ticket prices on a wide variety of concerts.