What is the minimum one can communicate with coauthors
I think that, ethically, you have reached the minimum. If their names are to be attached then they need to sign off on the result as published. But it may not be necessary for them to see how the sausage is made. So, I think you are fine in what you suggest. 

However, you should expect questions about why you made certain changes and you might, at that point, need to share something of the comments of reviewers that led you to make those changes. 

The endless arguments may still occur, but at least you will have an updated version about which to argue, rather than just a lot of disparate comments.