But I like this open world
I have no problem with it being "too small". I bet Fallout 4 will have a brand new and awesome engine so it can be made really big and beautiful and without annoying physics glitches and [censored]
I like the map node system for several reason but the biggest one is that: The world doesn't feel too cramped up.
Imagine New Vegas with 3 more towns the size of Vegas in it.
With this new sandbox map system, we get less locations (As in real towns, Klamath, Den, Junktown, Hub, Adytum, San Fransisco etc) and more useless crap (Oh.. Another dungeon...).
The one thing I love the most over all else in Fallout is the lore.
And don't get me wrong, you could have
one room and detail it enough to cover more lore than entire San Fransisco.
But I feel like I want to see more of the world and it's people, see more unique communities and cultures.
Sandbox map just doesn't cut it for me.
Either it's too much of the same thing (Fallout 3: Yay more bombed buildings! New Vegas: Yay more NCR!) or it's cluttered with unique stuff which just makes the world feel like a themepark.