I still think her biggest problem is just not being known at all. A lot of Democrats don't really have an opinion one way or the other, and that's odd because she's the first woman Vice President. You'd think that the first would be somebody more known to the public, since it would seem natural that she'd be a successor.
Maybe she's just going to be like most of the men that came before her and be someone that was just there and not really have much significance.
I don't see her as winning the party's nomination in the future for POTUS unless there's absolutely nobody else to choose from. By the time 2028 comes around, there will be new national figures for the party.
Biden was well known as VP.