Wiki says: A mod or modification is the alteration of the program code of a video game in order to make it operate in a manner different to its original version.
That's what a lot of folk want. Not DLContent.
Wish it could happen but apparently, by other posts and queries.. it will never happen to SSE.
So don't hope too much !!
There are many other games which don't have their data frozen but SSe is NOT one of those.
In the meantime one can play and enjoy what there is. Much like Pacman or snakes and ladders.