In addition to your qualitative points, can we imagine, and possibly even calculate, the cost of serving a member of the public in these three sizes of institutions? Which is the most economical? What other ways can we access the differences and perhaps decide if there's an ideal institutional size.
Also, I'd like to know more about your observation that "the way middle sized institutions can thrive is by playing on their ability to influence the community. " A deeper discussion of this point, here and perhaps in class, would be interesting.