ok let me see:
I agree with the myths, though I can't comment on M2 because for the most part I don't like to drink and I think that M3 applies to protein supps as well (maybe multi-vitamins are ok, don't know their impact as I have not done the research). You already know I don't agree with P1 (especially in diet mode). P2-P4 seem ok though I would change a few things. So I would rewrite P3 and P4 as follows:
P3) intake of calories which leads to desired weight loss or gain,
P4) hard anaerobic resistance training at least 3 times a week.
OK, good points.
Regarding P1: on my next diet, I will try a lower protein intake, but still above 0.5g/lb lean mass, since this limit I have already determined.
Regarding M3: Yes of course, all supplements are included. M3 does not say that all supplements are evil, it just says that they are not necessary. I chose to use protein supplementation only to make P1 easier, but I could do the same thing with solid food. I quit the multivitamins a few weeks into the diet, I'm sure I can do the same and better with fruits, vegetables, meat, etc.
Regarding P3, I defined a range because I think less than 1lb will probably not be desired by anyone on a diet and more than 3lb will lead to increased muscle loss (which by definition is not desired by a bodybuilder). That's at least my experience.
Regarding P4, You're right, I changed it.