I don't know if the tour going around now is the same one that was touring in 2003, but that one was non-Equity. As for the "concert-style" seating, that *does* sound like it's playing an arena. When it was in Denver, it played the Buell Theater and they didn't move seats around or put seats onstage or anything.
I can't imagine how a concert-style venue for CATS as a touring show can be any good. That only works in permanent venues (the Winter Garden had a semi-traditional proscenium design, but the set basically extended into every part of the theater, and the New London did it in theater in the round).
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