Sure - but in 2006, we had just two guys, and a true frosh at #3... and then nothing. Now, the 2 guys were exceptional and managed to stay healthy - which was a big benefit to us - but we did not have depth that year. We only had 2 RBs on the roster (Rice and true frosh Young), and a FB who could be switched over to RB if Rice went down (and we weren't deep at FB, either).
In 2015, we have James... then two quality sophomore backs behind him... then two more backs who have seen significant time over the last two seasons... then a freshman who is redshirting. That's 6 RBs on the roster, 4 of which will be fighting for PT behind James as the starter and 1 that is redshirting because the field is too crowded (there was no way Young was redshirting in 2006 as the only other RB on the roster - he was needed immediately to have any type of depth behind Rice).
While the top 2 have not shown (yet?) that they can match Rice/Leonard in productivity, there's much more of a depth safety net in 2015 than we had in 2006. We were very fortunate in 2006 to avoid injuries at RB, QB, OLine, and TE... because there wasn't a lot of depth at any of those positions.