Its not arrogance you dud. 12 Grand Slams by the age of 26 is no mean task. In these days of extreme competition, even a single GS title can go to players heads. Roger is down to earth even after 12 GS. Your comment is apt for single GS nothings like Andy Roddick.
This year, Roger is just reeling under the pressure of the 14 GS record breaking threshold. It is just weighing too heavily in his mind. It shows in his body language and energy level. He lacks his earlier sharpness. Anticipation skills have reduced. And his movements are sluggish.
His overall game is not suitable for the slow clay turfs. But still he has managed to win many titles on clay, and has reached many finals. That speaks about his greatness. So, its ignorance to call Roger as arrogant.