It sounds to me like at least part of the reason was that the degree title was not well known, though maybe some of the content changed too, I'm not sure. That's part of why I suggest the "MBPA" name here: the "MBA" has extremely high name recognition, so I feel like it's important to be similar.
Also, Yale used to have (still has?) an MPPA - Master of Public and Private Administration
It looks like they got rid of it after a new dean came onboard in 1995: https://spinup-000d1a-wp-offload-media.s3.amazonaws.com/faculty/wp-content/uploads/sites/31/2019/06/2005-05-06-AtB-Hardly-Academic.pdf
It sounds to me like at least part of the reason was that the degree title was not well known, though maybe some of the content changed too, I'm not sure. That's part of why I suggest the "MBPA" name here: the "MBA" has extremely high name recognition, so I feel like it's important to be similar.