Forget being concerned with Julius. Julius hasn't been consistent, but then neither has our O-Line.
Who we all should be worried about is Tyson Thompson. The guy had his share of chances to return kicks last year, and it seemed like 85-90% of the time, the guy made up his mind before he even knew where the hole in the wedge was. Not to mention how easy he went down after the first contact was made. I will say though that he had a decent 24.5 yd/kr avg. But even then, we need someone who is more of a threat to score.
As a RB, he didn't really have his chances except that one game against the E-girls. Even then he had a so-so game (20 for 75, 3.8 avg). I'd like to see more quickness, shiftiness, elusiveness, better change of direction from him this coming year.