ORLANDO, Fla. — It is the frustration that is, in a way, the most refreshing aspect of Tiger Woods’ Sunday. Don’t tell him that, because his fury was genuine, first because a putt for the share of the lead at 15 didn’t fall, then because his tee shot at 16 went hopelessly awry, finally because he fell from contention with back-to-back bogeys on the 70th and 71st holes of the Arnold Palmer Invitational. But look at all the phrases that casually, naturally, appear in the above paragraph — “share of the lead” and “Sunday” and “Tiger Woods” and “contention.” Rory McIlroy won the tournament with a sparkling 64 that included eight birdies, the last a 25-foot putt at 18 that followed with a full-on first pump that punctuated his first PGA Tour victory in a year-and-a-half. McIlroy is among golf’s most prominent stars, a needle-mover in a sport that yearns for them.