UF uses average freshman grade data. They just don’t want to publish it. It’s not because it’s too difficult for them. 
The CDS is an effort to standardize such information to allow non-technical consumers (prospective students and their parents) to better compare apples-to-apples and oranges-to-oranges with respect to a university education. It helps these persons cut through sales job hype and see actual value, or as close as can be determined.
Here are a few public universities which publish this data:
Georgia Tech: https://www.irp.gatech.edu/common-data-set
U North Carolina: https://oira.unc.edu/files/2018/06/CDS_2017-2018_20180605.pdf
UC Berkeley: https://opa.berkeley.edu/campus-data/common-data-set
Michigan State: https://opb.msu.edu/functions/institution/cds-2017-20181.pdf
U Michigan: http://obp.umich.edu/wp-content/uploads/pubdata/cds/cds_2017-2018_umaa.pdf
U Georgia: https://oir.uga.edu/_resources/files/cds/UGA_CDS_2017-2018.pdf
U Alabama: http://oira.ua.edu/new/reports/5a6645abd7005c7c3be281b6?Report%20Type[0][0]=Common%20Data%20Set
Were I a UF grad, I’d urge the school to publish a full set of data.