I think I would be on very safe ground to say that the Roman Catholic Church has never made anywhere near the changes made by Jehovah`s Witnesses in their 2000 year existance.
Well, that may be pushing it a bit, Smiddy. The Catholics have changed so much of Christianity that they bear little resemblance to the ancient church. For example, we have...umm...the veneration and prayers to saints, the veneration, assumption and prayers to Mary, the Trinity, Transubstantiation, the robes, pointed hats and other outer vestments, the Sacraments, genuflecting, the repetition of prayer, changes to the priesthood...and the list goes on and on. Those are a lot of changes!
Let's not forget that the term "Governing Body" does not appear anywhere in the Bible.
Nope, no prophesy that there will be a Governing Body in the future, nor are there any prophecies regarding the church going in the direction that the JWs have gone. They're Protestants pure and simple. If they believe the ancient church survived, where's it been for the past 2,000 years? Anciently, God called prophets and when He lived on Earth, He chose 12 apostles, Bishops, Seventy, Elders, Priests, Deacons, Evangelists and so forth. Of that group, the JWs only have elders and no line of apostolic authority and no record of divine commissioning, where God acknowledges His church.