Mikko Nissinen has spent his first three years at Boston Ballet completely remaking it. “He didn’t waste time making changes at the Ballet. Of its 47 current dancers, he’s hired 32. He’s made a fellow Finn, Jorma Elo, the company’s resident choreographer. Elo is a highly sought-after talent at the moment, ‘and when he goes around the world to work with other companies, he’ll go as resident choreographer of Boston Ballet’.”