Take these steps and the schism will still be there as Protestants and orthodox Catholics will believe mutually incompatible things, each living a different Gospel.  The schism will be hidden, causing even more confusing in catechesis and evangelization than there is already.

We do not all believe the same things and just speak of them in different terms.  The difference is not like the difference between Roman and Eastern Catholics.  To faithful Catholics much of Calvinism is not some cultural difference but wrong, repugnant, and unChristian and the so-called "Pentecostal" practices are blasphemies, in both cases leading people away from Christ.  Maybe Kung's Protestants are different than ours in the Anglosphere.