I'm sure they are small on purpose, but I was thinking along the lines of Berkeley being a public university. One of their mandates must be to service the needs of the state of California. Now, I understand that public universities don't really get much of their funding through public sources, etc., but to me it seems like Haas is not doing its best to meet the needs of the state and local community.
It would be kind of like the undergraduate division making the decision that they would like to compete with Princeton, or something like that. I bet that drawing from the CA applicant pool and offering in state tuition, they might be able challenge Princeton in terms of selectivity, but that wouldn't really be the best way to discharge its duties as a public university.
Stanford boasts about their small size, and that's their prerogative as a private university, they are actually 50% larger than Haas.
Basically I'm just whining that there should be more seats.