I think you are forgetting about the 11 4-star effort in 2011, and the 8 4-star class in 2010. The coaches are doing pretty well, but they need to start closing on more highly regarded players. We've had 4 3-star commits in a row, and need to get more difference makers in the fray. (Edit: 3 3-stars in a row).
Getting 4 and 5-star guys on campus is great, and admittedly the recruiting cycle is generally longer for them, but we still only have 4 4-star players committed out of 10. That equates to very similar numbers to Bo's 2010 and 2011 classes. The difference would be that Bo had more 2-star guys in his classes.
I'm no fan of Bo, but he and his staff brought in a few pretty decent classes. They couldn't keep the highly regarded players on campus, but they recruited pretty well in a few classes. We need to get around 10 4-stars every recruiting class to keep pace with the Ohio States, Michigans, Michigan States, and Penn States of the conference.