There are surely many who have changed to the view that Kamala is an amazing person. But from things I hear from people, that's not it.
To me, Kamala is truly cringe. Embarassing. That's obvious to everybody but I do not vote against her (I am no Trumper, but he is my choice). But that doesn't matter much. Kamala voters are voting for the Dem/government machine, and against Orange Bad Man who many people feel is cringy in his own way.
Kamala voters know that presidents do not run the country, much less run the federal government. Yes, they do have a phone and a pen, and a bully pulpit. Yes, they do control the State Dept and the Justice Dept and the War Dept, but government is too big - it's its own animal. Obama and Trump both bitched about that, but it is supposed to be that way.