Interesting. Seems to be the exact opposite of doing pro sound.

In a concert hall situation trying to eq is pointless unless the levels and time alignment are at least close. Everything will require adjustment along the way.

I have not made it very far into the REW site but what I have read has a section regarding time alignment. Looking at the screens there is detail shown that did not exist to us back then so can see minute adjustments to levels and distances as part of the process.