Reesing was pretty horrible his final season.
IIRC, he had lost several members of his O Line. Didn't he lose a WR, too? I don't have time to look it up right now.
Reesing isn't the gold standard of QBs, that's for sure, but he was pretty good. I really think he's analogous to Joe Ganz.
As knapp said, not the gold standard, but he played on a poor team. That fact was very clear given their performance before and after him. And his senior year was far from horrible....
3600+ yrds,63.% completion, 22 tds and 10 ints for a team that won 5 games and went 1-7 in the big 12 is not horrible