Wow. Your church is just like ours, right down to the arches, fans, projector, and lighting. I am glad to here you are maxing out the place.
We could not get good sound from the choir or the worship team when they were located between the two little rooms up front. We finally put the entire worship team down in front of one of the rooms and to one side. It is not a good layout because they are all lined up in a row but it is a much better sound. Next we brought in a guy who EQed the room and carefully aimed the speakers. That got rid of some harshness and got a more even volume. The next biggest improvement we made in our sound was IEMs. To my surprise they instantly quieted down the piano and drums. (Why, Because the cycle of each playing louder then the next to make them selves heard to themselves was broken.)
I agree with others, you need everything going through the sound system.
Frank