The Anglican Ordinariate is possible because Anglican worship and practice is very similar to Catholic. Many Anglicans hold Catholic beliefs regarding the sacraments. The leap for them is far easier than it would be for a Protestant.
That said, I expect that the Anglican Ordinariate could indeed accomodate Protestants who are used to different styles of worship. After all, we Anglicans share a large corpus of hymnody with Protestants. And of course, all the Methodist denominations are daughters of Anglicanism. The Book of Divine Worship is a re-working of the 1979 Book of Common Prayer of the Episcopal Church. It contains "modern language" masses that could be make Protestants comfortable. It would still be a huge leap though.
However there are many aspects of Protestant spirituality that have their origins in the Church Fathers.
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I've brought up a hypothetical idea for bringing protestants back into the Catholic Church based on the Anglican ordinariate.
What changes would protestants have to make in order to join the Church and what traditions, liturgy, and confessional documents would they be able to keep.
I'm not looking to convert just interested in a theoretical idea.