Just out of interest I had a look at the AP website and I noted that the staff were people who happened to be pilots. Other than the ex 747 pilot the other two are from non-aviation backgrounds. I would have expected some engineering background. I noticed that two of them flew for the CAF. I wonder what that organisation uses as their SOP for mixture control? I also noticed that there are no upcoming courses.
I don't have an opinion one way or the other on the issue of LOP or ROP but I have learnt from experience that wandering off the reservation in terms of POH puts one in test pilot territory. I have never subscribed to the theory "Its ok everyone does it this way" when its not stated in the manual.