That's wayyyy too early to say. Her only really different policy position is on Medicare For All and fracking, everything else is a matter of degrees. Even then Biden doesn't particularly oppose Medicare For All, he just said it needs to be tax supported and not based on debt spending.
Whether she'll be better in practice is really more a function of Congressional support. If the Dems can't take Congress and the pack the Court nothing else will matter anyways.
Unless she wants to take a firmer position vis a vis Officially Acting to Publicly Execute certain Justices. I don't believe she's stated an intent on that.
We can never expect anything groundbreaking out if the Democratic party. The best thing is just solidifying some already predatory practice that may be slightly better than the previous predatory practice. Your best bet is to support any sort of voting reform that you come across such as Ranked Choice Voting. With that, we can hope to rid ourselves of the two-party hegemony.
Absolutely. Add capping campaign spending, overturning Citizens United, and making it easier for alternative political parties to get on the ballot to that list, too.
I mean that's established political wisdom: establish yourself as a progressive in the primaries and then move towards the centre for the general. That has been the democratic playbook for many elections. And it kinda makes sense: You need the base for the primary but those voters alone are not enough for the general.
Biden was actually an outlier in that regard. He actually moved left in his campaign rhetoric after Bernie dropped out.