He is a full professor and this article, although critical of Columbia's push to improve its ranking, is dry and lacks hot-button topics.
Per the article, transfers get much less financial aid than non-transfers at Columbia and also have much lower graduation rates, which is the opposite of what is seen at other schools with large transfer populations like in the UC system.
Prof. Thaddeus is very courageous for bringing these facts to light, and/or has a deep love for his university that he feels is being corrupted by their pursuit of a higher ranking.