I will be keeping an open mind. No worries on that one. May I remind you, that I am just starting. I don't know what will work for me. But I know a lot of people that have used parelli at my stable and it is convient to have that.
I will only respond to the OP because I don't care about the other stuff being said....it's pointless.
I think it's great you are getting into Parelli! I'm 100% for it and I think you will love it. I'm a Level 3 student of the program and it's by far the best program I've ever done with my horses. They are so thankful I found it! Lol.
Something you might want to keep in mind is that you may find that a completely different horse shows up when you start to play with him. But this is because you are opening cans of worms that were not opened before. These issues have always been there, parelli just gives you the tools to open those cans and solve the problems. I'm saying this through personal experience.
I would advise against using different people's training methods at once. That will only confuse your horse, find something that works and stick with it, but make sure it's working FOR THE HORSE. What is convinient for the human is rarely what is best for the horse.