Well, well, how would you implement bases on such megamap, then? Just everyone will be able to find them, not to mention the tents. And how about roundbased combat option? Global roundbased hell?
Regardless how I turn it left and right, I dont see any "awesomness" there as you described. It only means adding unneccesary work and the removal of yet another feature what made fallout a fallout game.
The problem is to make the big map to look and feel good.
I compared it to Arcanum before. I was assuming that you DONT have a worldmap picture where you cant see where you are at the moment.
And how would you be able to *find* your tent in a huge worldmap? Stumble upon 2948209809 other tents till you find yours? Did you even bother to look at a HUGE map of in fallout or think about it for a moment? It's just bound to fail and a horrible idea.