none of this involves other people which is what a mmo is. that is the main reason you have yet to see it in a mmo.
it is far easier to build on what there is a foundation for rather than start from scratch. what you propose has no foundation to build on.
i cant see how this will appeal to a majority of players.
people please don't flame me for inserting paragraphs. i did the best i could with the material i was given and the time my burning eyes would allow.
Don't worry, I addressed all of your guys' issues with the huge wall of text. I also added new suggestions for people who would want to do this in groups, including suggestions for rewards. Thanks for reading.