We have begun to record today. Room acoustics were far worse as I thought (The hall wasn't intended for classical concerts), there is a strange resonance in the low mids, and the reverberation makes that this arrives out of phase to the omnis.
Luckily I had placed mics for two alternative setups, omni pair+DIN pair in one bar and spot mics. I think I'm going to use the DIN pair with some spots for presence, I fear the omnis are rather useless in this hall I fear (Maybe I still can use them lowpassed below the resonant frequency to give some roominess to the basses).
This is my first impression after a quick hear through the headphones after the session. Next week I'll upload some samples.