I was in IRC saying this the other day, and I'll say it again here. All those things are secondary. Not saying your idea isn't good, it's just not relevant.
If you talk to people who play D&D, almost unanimously you will hear one thing: being a good DM is hard. And it requires a LOT of time. For people to experience quality RP you need the good DMs. You need people willing to put the time and effort in to make it a good experience. Currently there just aren't people taking that big of an initiative upon themselves, and until that changes, no matter how good the mentorship prospects are, unless someone is demonstrating actively how things need to be done, no one else will learn how things should be done.
I don't propose to have the solution to this one. I don't have the time to put in, and even if I did, I'm not sure I'm willing to. PS was a cool part of my life, but I'm not sure I want to go back to it. I'm pretty happy to be an alumnus. Absolutely, one hundred percent I see this as the problem, though. From a dev point of view, what needs to be done in the game is to make the storytelling easier. The printing press idea is an invaluable one. If there's a new BBEG (Big Bad Evil Guy), then the number one goal of the BBEG, in terms of storytelling, is to get his name known. Get the fear instilled in the population. Nervousness. If no one told Harry not to say Voldemort's name, I'm not sure the Potter guy would be scared of him.
The rest of the community just has to either wait for their Dark Knight to come save Gotham, or a buy some hockey pads and try saving the day. Whoever takes up the mantle has a lot of work for them. The rewards are great, the feelings I had when I ran a successful, long-haul storyline were uncomparable. I just hope there's someone left in the community willing to take on the task (and that they hurry up and do so).