Umphrey’s McGee brings its eclectic improv, with its innovative fusion of genres, moods and tempos, to Ford Amphitheater on Friday. If you’ve seen the band in Vail before, bassist Ryan Stasik guarantees it’ll be a whole different show, with new songs and a new production. “They’re going to get a taste of everything from the late ’90s to the early 2000s, but we want to keep it a surprise and keep fans on their toes,” he said. “We like to change i…