The big orchestral headlines regarding music directors may have been made in New York and LA this year, but the Detroit Symphony feels that it snared a gem of a leader in Leonard Slatkin. “Slatkin is the whole package. His musicianship won over the musicians while his commitment to education, his willingness to fund-raise and think broadly about an orchestra’s role in urban life, make him, as DSO president Anne Parsons put it Monday, ‘the ultimate partner.’ [And] Slatkin gets the Midwest.”