Vocalists, sing to be heard, and instrumentalists, play to be heard. Even in the quieter places in songs, be heard! Perceived quietness is actually more achieved in the style than created in decibels. Sure there is SOME volume change, but mostly it is in the way you come across that gives a gentle sound, not just singing or playing with less volume. Likewise team, be able to build with energy by what you do, not just how loudly you do it. This will achieve that "loudness" the listener is looking for.
Instrumentalists, don't just try to play without doing anything wrong. Be interesting! This is the difference between exciting and boring. Add as much musical excellence as you can to your part, complete with things that make the listener want to rewind and hear it again to fully capture what was just done. Do this appropriately, not stealing the spotlight, but adding complexity where it can benefit, or simplicity where called for.
Tech, get good, clean signals on every channel. If necessary, use gates to quiet unwanted background noise on open mics. Get rid of stage floor monitors, if possible, to reduce stage noise bouncing around off the walls only to be found in open mics, muddying up the sound. Put enough mics on the drums to get the whole set cleanly and up close. Have a plan to keep things moving and flowing in the program without those "Uh....., what's going on" moments.
Team stage presence... don't be afraid to let your emotions be seen (the emotions that are brought out by the lyrics), not in a forced way, but don't look like you are trying to hold them in. Remember, most communication is non-verbal. And if the music makes you want to bounce a little bit, that's OK. Don't force it. Everyone has different degrees to which they are visually expressive and that variety is just fine.
Camera operator, explore what is happening with the cameras. Don't just get them all in the shot and leave it. Like the instrumentalists, be interesting! The creative combination of panning, zooming, and switching gives the impression to the viewer that we are moving throughout the room, exploring from every angle, giving full attention to what is being highlighted by those ministering on stage at the moment.