Riley is a veteran HC, whereas Pelini had no experience when he took over. Perhaps Pelini isn't cut out to be a HC, and the success he did have was a result of program itself and not his coaching ability.
Also, maybe the thought process was to go with a safe hire and hope that just some new blood would get them over the hump.
You don't have to look that hard to find plenty of examples of schools that were stagnating a bit but still very good, then replacing a solid coach with a splashy new hire and have things go historically bad for that program in just a few years - UM, ND, Tenn, USC.
Also, don't discount Riley's west coast experience and recruiting ties. Recruiting is something holding Nebraska back a bit and perhaps changing up recruiting territory up a bit might help.
This post was edited on 12/4 1:36 PM by turney333