Again, they use resume metrics to pick the field, and predictive to seed.
Miami wasn't even the last team in, they were the third to last in. Then they moved down when they used the predictive metrics to seed them.
Bringing up KenPom and any of those other predictive metrics is pointless in bringing up the team's merits of getting in. If Miami not only got in, but was a 10 seed or something, then you would have a point. As it is, you don't. Miami was ranked #37 in the committee's resume based ranking. Every team ranked in the top 46 got in, except for #44 Auburn, who ranked ahead of Texas and SMU. And the committee said Texas and SMU were the last teams in.
My guess is it was easy for them to ignore one spot of WAB ranking difference to put in a Texas team that finished 2 games above them in the SEC. The question here is how the hell did SMU get in