Whatever equivocation you try to do later in the article, your headline states "Tommy Rees Has Already Called Games For Notre Dame." You made the connection/premise that calling audibles at the line is some how equivalent to "calling a game." In short, no, he has not "called games." Using an audible is not "calling a play" in anyway similar to what an OC does since all a qb is doing is typically switching within options that have been set for him by the OC. Book "calls more plays" than Rees ever did simply because Book also uses RPO reads that Rees never used. Calling audibles at the line of scrimmage is not building game plans, blocking schemes, route design, etc and actually calling plays and devising ways during a game to defeat defenses.
All of that has nothing to do with Rees' capabilities as a possible OC are. We know he has been a qb and a qb coach tells us he knows something about offense. We know he has a whopping total of 2 years of experience as a college coach and little experience outside of the Kelly school of offense. Compare that, for example, to Charlie Weis Jr. who has exposure to far more offensive scheming and game planning that Rees has. And all he has evolved to, to his credit, is merely being OC at USF. So a team that aspires to win a NC (theoretically anyway) is going to hire a guy into one of the key positions on a team who has a whopping total of 2 years of college coaching experience? Sorry, notwithstanding what one thinks about Rees' upside, it smacks of Kelly cronyism and picking low hanging fruit which I thought he was moving away from.
BTW, "Rees is probably the most polarizing player of the Kelly era." Huh? Polarizing means engendering polar opposite views. Having a unpleasant (and apt) nickname does not make someone a "polarizing" person. There are very few people who have strong opinions about Rees as a qb one way or the other. Book, for one, is far more polarizing than Rees with many folks thinking he is a legitimate Heisman candidate to those who think he wouldn't make the travel squad of top 15 teams and praying that he goes pro. THAT is polarizing!