"Shut Up and trust the Magic Pixie Dust" isn't exactly the best answer to give to a bunch of contrarian, independent-minded audio techs.
But that's exactly what d & b, l'Acoustics, EAW and JBL are doing. And so far, most of the techs I've met aren't capable of *engineering* a system (of any significant sophistication) at the pass band level. It's not a knee jerk deference to a higher authority, it's an observation after 30 years in the trenches.
That said, if the voicing of the rig is at issue, get them a bunch of EQs, install them with great fanfare and costs... and hardwire them into bypass or don't put them in the signal path. I've seen both done in installs. Apparently the placebo effect is very strong in contrarian, independent-minded audio techs.
Have fun, good luck.
Tim Mc