The story has ended, quests are done, what is it that there is left to do in the world? Just killing monsters? That sounds a bit dull.
Let it be done at the end and invest the time in a mod toolkit instead I would say.
Replay it, choose other options, other responses and enjoy it again.
Games tend to end at a point, and with the free world in ED I'm sure if you want to, you can do all avaible quests before you finnish the game.
