Now that Orange County, California has its beautiful and acoustically impressive new concert hall, it’s time to start asking whether the principal tenant lives up to its new digs. “The Segerstrom, with 2,000 seats, is a place a lot of major orchestras in big American cities would kill for. The Pacific Symphony, on the other hand, is more than a pickup orchestra but also less than a year-round, full-contract ensemble… The citizens of Orange County have dropped a splendid gift on this young, perhaps embryonic orchestra and will now wait to see what they get in return.”