Much further to the left things like criminal justice reform and the environment. Bernie would probably pass a Green New Deal.
...if he somehow had larger Congressional majorities than Biden does OTL. That would be a great timeline on those fronts but I have no idea how Dems would've taken back control of Congress in 2016 even if Bernie won over 300 EVs.
3. Bernie probably takes a considerably more civil libertarian approach to COVID than Biden or the average blue state governor did IRL. Concern over working class unemployment would factor more strongly in the Dem COVID message.
I can kind of imagine this, but do you mind elaborating?