I don't believe Tim Smith should be dropped or that he will be yet, however there is no doubt that his defence is currently not up to first grade standard and needs to improve dramatically.
Tim Smith has some fantastic elements to his game, passing and kicking are both right up with the best players, although occasionally a bit wayward, but the genius plays make up for it.
He also has some areas to improve, his running game and his defence.
On defence, its not like he is a small halfback, its just got to do with attitude and at times technique.
I doubt he will be dropped, but yeah he could do with some work.