I think the problem with Warren is that her team was very weak, and she got trapped in modern progressiveness's bubble of thought- which ultimately has little to do with most Americans' concerns. Imagine if the Warren on the campaign path was the Warren below?
IMO, a Biden presidency will be very much similar to John Tory's mayoralty- a relatively bland, safe figure who 'represents' a return to 'normalcy' and 'presidentiality'. It'll be considered like awaking from a nightmare, and reassuring yourself as if things never really happened.
The Washington consensus will be restored, the VP, Secretary of State, and the state departments will run the show, and US-China relationships will be restored to a pre-Trump state. Biden, assuming his role as public figurehead, will very much be heralded for his 'presidentialness', and will be considered the inverse of Trump in all areas.
But of course, the solution for one problem usually sets up the next problems- and like how Tory's tenure has led to many otherwise-fixable issues coming to a boil- the US's long-term domestic and international issues may very much not be fixed under a Biden presidency.