@Devyn: And you excuse me, as I was somewhat "angered" because I tried to express my thoughts but struggled because of my English skills - have to spend some skill points on them

-.
But back to your arguments : Even if these "same players" are at my table with their "historical" knowledge this is now after the Spell Plague worth




. They cannot bubble and bobble about how Kherunsun discoverd this and that and therefore we cannot do it because the 13 have this and that.
Don't you understand?
With the fresh new FR I am at the same level with this guy who gave up his life for all FR novels, comics, p0rn, computer software and so on. He cannot argue with me because we are at the same knowledge.
This is impossible - just right out impossible - with the actual edition. Every one who has read more novels and sourcebooks and what not will kill my gaming session or - the other way around - I am not able to make the FR setting in his mind right so that he nor me will enjoy.
But - my person as an example - because I know very less about FR - I have only the grey box - most people out there would not even enjoy one minute of gaming with me even if i can come up with glorious events and adventures just of this reason above.
With the new edition all these problems go away. Even as you said that in short time there will be several books I as a GM will have at least the same knowledge level as my players .
So in the end I can give them the right imagination of FR and even when they read novels playing on the new FR they will have not discrepancies with my presentation. With this I mean that I don't present them the FR equivalent of : "Gandalf the Green" and "Aragorn the Hobbit King" in Gondor the main city of Hobbits where Gimli the Dwarfen God is the main religion.
I will tell them things and describe places on the line of the original authors. In the actual edition
I very well would make very very much mistakes from the "facts" point of view - and tell me would this above picture for you Middle Earth? -.
I hope you understand.