It is hard to know the reason for all the override requests, and it may be that colleges simply feel that they need more time to understand the implications. But I guess that the proposed rule works to the disadvantage of most schools.
Now it is a mess, because apparently some colleges actually wrote this $2K into offers during the early NLI period. The NCAA press releases seemed to describe the legislation as a done deal, and I infer that some schools assumed that they were entitled to offer the $2K. According to the above press release, existing commitments will be honored, but perhaps no new ones will be offered.
I think the implications for Title IX are significant, and it points up the stark difference between men's basketball and football versus any other sport.