Since his ascendance as a crossover success following the release of last year’s sprawling The Epic, Kamasi Washington has been classified in several ways: jazz icon, West Coast wunderkind, even, in one dubious headline, the “High Priest of Sax.” But is he a revolutionary? A May 8 concert, part of the Red Bull Music Academy Festival New York, posed the question, as Washington shared a stage in the round on a triple bill with two jazz totems deserving of that epithet: the Sun Ra Arkestra, under the direction of Marshall Allen, and Pharoah Sanders. As 800 fans, many if not most of them under 30, clambered into a cavernous soundstage constructed in a warehouse in Greenpoint, Brooklyn, replete with smoke machines, live psychedelic visualizations, floating cosmic light orbs and white…