Having seen them several times , I can say that it's not unreasonable. Volume is dependent on the venue and your position to PA cabinets. The theater shows have been reasonable at mid floor or balcony for sure.
The Clifton Park show was in a huge bar room and the room + PA were geared to a more brittle sound overall. (Co headline with Opeth might be why it sounded this way. I risked getting beside. a PA cab to be within 15 feet of Guthrie, Adam and Theo. Once I got past it, I could see and hear well.
During start of Holy Drinker there are two basses going. Deep keyboard textures there and during Watchmaker too. All great.
Bottom line: take earplugs if concerned.