Hi Mike,
The reason for wanting a separate reverb on the stream is that it sounds nice with a longer hall reverb. However, that longer reverb does not work in the church, because it crashes into the building’s natural reverberation. However, I concede that it might be over-engineering.
A few weeks ago, I tried leaving the stream reverb on, while the service leader was speaking. It took me only a very short time to realise that it was a bad idea!
As you suggested, I have created a DCA for all the effects channels and I will probably make it a mute group. Aside from being useful in this particular situation, it provides a useful “get out of jail card”, if the effects go wrong and the sound engineer just wants to silence all of them quickly.
Thanks again for your advice.
Graham