Hmm, I'm confused too.
I believe that adding a global password to TeamSpeak should have made absolutely no difference to anyone's voice rights.
Removing the password from the passworded channels might have, possibly, but that would also seem odd.
Removing moderation from a channel should, in theory, allow anyone (who can connect) to speak in that channel.
Thus, adding moderation back to a channel should, in theory, be the thing that prevents people speaking unless they have voice or auto-voice, or are an Op, CA or SA.
Am I missing something here...?