No, I want to keep exploring the world.
The thing I disliked most about Fallout New Vegas is that after you ended the game with an epic battle, it just shut down.
I specifically got a mod that allowed me to continue the game after that point.
There may be no point to it, but I like to go exploring and adventuring long after the game is done.
Plus, it allows me to keep working on some of those achievements long after the game ends.
So I want Fallout 4 to allow us to keep playing after we finish the main missions.
I assume you can keep building your settlement after that point, so there would still be stuff to do.
And when DLCs are released, you just load your save and go out to have more Fallout Four Fun!