This is a fantastically minor point, and I want to emphasize I consider this merely a matter of fluff/flavor.
When hunting with bards, I see this message when someone drops GJ -
"The aethereal static subsides, returning your spellcasting abilities to normal."
Oh boy! I can cast spells again!
It seems somewhat silly, but it might be fun for NMU's (I guess it's just Commoners, Thieves and Barbs soon) to get different messaging when subject to magic hindering abilities. I'm not even sure if there are other spells that this applies to, but I think in the barbarian tradition it would cool to have a slightly different message.
"[Bard singing GJ]'s incessant droning ceases, giving you some peace and quiet once again."
Or something.