Krenzel was the perfect QB for that system - did not make mistakes, made plays when it mattered (4th and 14 vs Miami, Holy Buckeye, etc) and was an integral part of an unforgettable team.
With that said, under Krenzel, the offenses were anemic (put down your pitchforks - Krenzel was a great representation of OSU football and embodied everything Tresselball could be when executed correctly). This could be due to conservative play calling, or simply the coaches acknowledging the limits of Krenzel's abilities, or having a defense that alleviated the pressure on the offense to be overly aggressive.
Interestingly, Braxton gets a terribly unfair shake from a sizable portion of the fan base who clamor for a "pass first, run 2nd QB." All the while, he's been the best player on two of the best offenses, statistically speaking, in OSU's history (not to mention the 2 B1G POY awards...). That Braxton has 1 (ONE!) game in his career with multiple INTs (2), and also has a knack for making huge plays makes one wonder the possibilities of putting that 02 defense (or most of the Tressel-era defenses, for that matter) with last year's team (Sigh).