H.R.676 is dead, I’m not sure I see any point in referencing it anymore. H.R.1384 which replaced it sounds like it has the acceptance of any group associated with the push for Single Payer (e.g., read one of Adam Gaffney’s responses at https://www.healthcareforallnc.org/2019/introducing-hr-1384-medicare-for-all-act-of-2019/).
Now S.1804 is also dead (Bernie’s new bill as given in the linked PDF in this article does not have an S.# designation yet). You could read both texts (H.R.1384 and the PDF) yourself and decide or just wait for the advocates to respond.
I personally don’t see the point of Bernie doing this - I would have preferred he copied H.R.1384 verbatim and then as needed, added financing details not present in the house bill yet. I get push pack from political wonks here, but to the average voter there is no good reason to have two bills - just more confusion (note: Bernie was in communication with Pramila during the crafting of H.R.1384). That doesn’t mean Bernie’s bill is any worse than H.R.1384 - we’ll have to see (I won’t have a chance to read both bills enough to have an opinion myself for a while - I’m sure others will though and I’ll see what they have to say).