Wickedfan, I saw the original Broadway staging, I'm not sure what they meant by revolutionary. The only thing I can think of is that concepts that were used in opera were on the Broadway stage. The original Broadway show used actual movie and newsreel footage of Eva Peron. (Perhaps using movie projections during a song was considered revolutionary). The scenery was movable set pieces and there was a large bridge across the stage, but I don't remember anything that really knocked my socks off in Evita. (The ascending tire, descending chandelier and flying helicopter were still a few years off).
If anyone ever tells you that you put too much Parmesan cheese on your pasta, stop talking to them. You don't need that kind of negativity in your life.