The Church in the developed world has gone through several decades of the "silent schism" - that is people who just leave the practice of the faith while many others are "occasional" practicioners.  Some join other established Christian churches, some don't join any other religion, and then there are also groups that create faith small communities, there is the women priests movement, there is even SSPX on the right.  I think you may be right that these groups are necessary as new forms of organizing the practice of faith and setting an example of how that may work.  Maybe, in 100 years, the Roman Catholic church will seek to allow these alternative forms of "church" to practice faith their own way, while still having what I would consider a remnant church that practices as it does today.  BUT, I think acceptance of the all male, hierarchical/monarchical "ontological" superior clerical caste will be have to be optional.  Can we have an umbrella church that encompasses all that?