I completely agree with the concept of progressive discipline. But, there is no reason to kick him off the team for good. The first public intoxication involved AT passed out in an alley - a bad situation but he was not hurting anyone. There is no evidence in the public sphere to link his academic problems with alcohol, although that may be. Still, he became eligible for the fall, so there was progress there. A second alcohol offense should involve a stiffer punishment, but not dismissal. We have yet to learn specifics about any physical assault.
I think some of us get carried away with wanting to punish athletes excessively. The average student would not be kicked off campus for two public intoxication offenses. Athletes have advantages, but they have tremendous time demands too. This is particularly so in BB, in which the season covers two semesters and mid-week travel.
I was never arrested while at Iowa, but was publicly intoxicated many times. I can admit I was lucky. I turned out to be a moderately successful adult. So may AT.