There are some fans that never got over the fact Rees was QB when there were higher recruited guys were on the roster. We saw some of those guys implode like Crist and Hendrix, we lose that 2013 USC game if Rees doesn't play the 1st half (Among other games he bailed us out). I don't think anyone seriously believes he was the greatest QB to suit up for the Irish, but he obviously has a great head for the game and his preparation was second to none. Some of that was imparted onto Book, and it showed. With the exception of 2012 when Golson was playing well, Tommy was legitimately the best QB we had from 2010-2013 and some people never grasped that.
There certainly can be a case made that he was a young hire, but there are plenty of young hires that have done well. Charlie Weis Jr was putting up good points with Kiffin at FAU and he' s a year younger than Tommy. This year hasn't been as great since he took the South Florida job, but they've also faced three Top 25 teams already in BYU, Florida, and SMU. Tommy has a pretty good resume though: he destroyed a very good Iowa State team was very stingy on defense and could have won the Big 12 that year, he beat #1 Clemson no matter how you slice it, got to the playoff in his first full season, and now we have an unfortunate situation with the OL that is stymieing our entire offense. People want Rees' head because they still have axes to grind, but we're certainly better at the wheel now with Tommy than we were with Long. The OL has to get fixed one way or another, nobody is going to be consistently scoring points with this offense until that gets fixed. I'd like to see the WRs group step up too, but we saw last year that Rees was able to find ways to score without as much production from them.