We are not talking here about minor disagreements which your post suggests is all progressives are doing. We are not talking about ‘disciplines’. We are talking here of doctrine, the whole of the constant Magisterial teaching of the Catholic Church on Faith and Morals rooted in Scripture, both OT and NT, in the the Apostolic Tradition up to and including the present day. 
You are talking about a ‘New Church’ with ‘new doctrine’ in the same way as the 16th century reformers did.
If what you want is a ‘New Church’ then why are you so averse to coming out and openly admitting it? The Protestant reformers didn’t shy away from it when it came to making a break, why are you?