It's not a great sign. They can invite 105 to camp (I think). If you aren't among that group, that does not bode all that well for your future.
It typically doesn't bode well - but, as others have noted, coming out of bowl prep he was receiving some positive reviews from more experienced guys on the roster.
The problem for Wilson is that he mainly was pegged as a back-up OLB (the LEO). Right now, our top 2 OLBs are automatically going to be Ben Niemann and Bo Bower. Consequently, the new LB recruits would receive preference as it relates to being on the fall-camp roster. It just so happens that we already had 5 more experienced guys who would be guaranteed to be in camp (Ben Niemann, Bo Bower, Josey Jewell, Aaron Mends, and Jack Hockaday). Then, in addition to those guys, we have the TR FR LBs (Jones, Taylor, Wade, Welch, and N. Niemann). Thus, that is already 10 LBs in camp! Any other guy would have to be at a position that lacked depth ... and we essentially have little to no depth backing up Jewell. That presumably landed Garbutt one of the 105 spots.
Thus, from a numbers perspective alone, it likely didn't make sense to have any or many more LBs than those guys.
However, if the what an earlier poster claimed is true about grades ... then that could be another contributing reason why he didn't lock down one of the 105 spots.