We'll never go to just Medicare for all b/c Health Insurance is over $1 Trillion dollar business in US. Congress would never make a $1Trillion business disappear. We might see some hybrid system if enough D's take over (that's essentially what Obamacare was, but we screwed the pooch so bad on it that we basically only got portions of it, many of them bad). Rest assured, doctors and hospitals will be left holding the bag.
From what everyone is saying, there will definitely be a vote and something will pass before November. Both R's and D's want this, and even Trump has said as much.
If the current senate version passes with Benchmarking, they won't need to improve their InNetwork markets, b/c Out of network will no longer exist. Basically everyone will be "In Networ", b/c that's the only rates they'll have to pay. Technically it's 125% of Median Innetwork, but all they'll do is lower the average rates of In-Network until the median drops below what the old Median InNetwork rate was.
If benchmarking passes, everyone on this forum is taking a 20-40% paycut. It says as much in the CBO estimate. Everyone needs to push their representatives to pass IDP (Ruiz/Roe) or else we are screwed.