It is not good for a university to have class sizes that are very large or very small, or to have professors with teaching loads that are very light or very heavy.
Conclusion
It is not good for a university to have class sizes that are very large or very small, or to have professors with teaching loads that are very light or very heavy.
Evidence (after all)
Crowded classes and overworked faculty cripple the institution's ability to recruit and retain both qualified students and faculty.
Evaluate
The argument presents a broad conclusion about the negative impact of both extremes: large/small class sizes and light/heavy teaching loads. However, the evidence focuses only on the negative aspects of crowded classes and overworked faculty. Therefore, there is a gap in the argument because it does not address why very small class sizes and very light teaching loads are also detrimental to the university's goals.
To bridge this gap, we need to support the conclusion with reasons that illustrate the negative effects of having very small class sizes and very light teaching loads on the university's ability to recruit and retain qualified students and faculty.
Goal
Let's find an answer that links very small class sizes or very light teaching loads to negative impacts on recruitment and retention of students and faculty.