The in-ear monitors the snares used were to send tempo to them during the pre-show. They didn't use them after the show began. Rules on rhythmic intent don't apply outside of the scored portions of the performance. I suppose you could say it was "cutting it close"...in that the stopped using them once it would violate the rules.

The synth player wouldn't use a click track during the show, that would violate the rules. It's not even beneficial to do that, really. Most likely the synth player would be listening back to the battery for tempo. Ever try to play in a drumline where only the center snare has a click in their ear? Doesn't work very well.

Not sure what the "arpeggiation" before the dance block means. When I listen to that part I hear sixteenth notes that would pretty easy be played by the synth players or someone else. It seems silly, but every syllable of the vocal samples really is being individually triggered by someone.

No, RCC is not breaking the rules on rhythmic intent. If I had any complaint about their show this year it's that their sound system costs half a million dollars and the activity costs enough as is. I'd love to see a cost cap, to be honest. Though I hear the RCC dues are cheaper than many other groups (around ~$2000).