Yes you hit the nail on the head here. I asked Mabel Sharp (the current carillonneur) about this once and even though the console is basically an organ console, attempting to play it as such would result in a harmonic disaster. The tones of each bell can still affect the others in the rack. You've got to learn what you can play together, what to leave out and how to break things up. Evidently Mabel played the harp before learning the carillon and it has similar issues. There is also quite a noticeable delay between when you strike a key and when you hear the sound from the speaker tower. Even when you use the local monitor in the room with the console there's more delay than I expected.