A common issue in church is the fact that you have the widest range of age groups possible, from infants to much more seasoned attendees (aka Old Folks). Now, hopefully responsible parents aren’t bringing their infant into environments that are upwards of 100dB. Everyone knows, as you age, your hearing begins to change dramatically and in many cases what might not sound harsh to most people, louder environments begin to easily become annoying or even painful.
The second change I made was to put a compressor on the master bus. Reducing the dynamic range of the main output by only 1-3dB depending on the style of song. Setting the compressor on the master bus is a bit of an art. For us, I wanted to compress the peaks and allow the compression to last long enough to supress the entire peak. I change the attack depending on the song, from 3ms to 7 or 8ms depending on the song. If your attack is to fast, you can lose definition in the high end, but you can compensate somewhat with an EQ. The release is set from 60ms to 120ms just depends on the phrasing of the song. This is controversial, at the end of the day, for me, if it sounds good do it. Light compression on the master bus just helps to smooth out the mix and make the mix sound tighter so its more controlled and not so much in your face. This is probably not something I would do in a concert situation, but for my specific church it has worked really well.