My take on wordclock: Changing wordclocks in a single-digital-piece system may change the sound very slightly
. Using an external wordclock in such a setup tends to be less accurate
than using the console's word clock because creating a stable wordclock isn't that hard nowadays. Syncing to an external wordclock is more difficult. Whether 'less accurate" means 'sounds better' is subjective.
However, it's highly unlikley that you or anyone else could hear the very subtle difference between internal and 'less accurate' external word clock in a typical live sound reinforcement environment with the audience in place using a blind test.
If you have 10 pieces of digital gear in your rig, wordclock distribution
In other words, voodoo bullshit.
You're better off buying some pyramids.