I have to agree , I don't care with the amp in the room tone while using these PZM rigs, they just act as another miking technique, and a very interesting approach.
We only got a few rigs ATM but they have been some of the coolest tone I could get from my KPA. A very good alternative to expensive mike and high end techniques, this is a very cool way to capture profiles.
The RAW sound you get from the stock profiles is pretty linear to me , but an incredible capture of the amp stack. I'm really impressed they are VERY tweakable !