By Sam Frost Rory McIlroy’s failed bid to return to the PGA Tour Policy Board has sparked fears the tour is in serious trouble, with a claim that player director Patrick Cantlay holds too much influence. McIlroy resigned his place on the board in November amid frustrations with the direction of the tour coupled with a desire to focus more on his own game and personal life. But last month he revealed a U-turn was in the offing after a plea from Webb Simpson. The 2012 US Open champion wanted to vacate his seat on the policy board on the condition that he could be replaced by McIlroy. The policy …