In looking at the extension - he is 35-25 in the last 3 years. (Of course, the other years "count", but if you're considering an extension I think you look at recent years). The trajectory is favorable. Yeah, gonna lose Garza, but if the Hawks can add a piece or two that could be pretty good.
All an AD has to do is look around at all the coaching carousels in the country. Michigan struck gold, but who else? Added to that fact, Barta can look at what Bowlsby did a couple of decades ago and see how that worked out.
The players love him. The arena would have been full this year. It should be full next year.
There was just no way he wasn't going to get an extension.