If I were too mod the game(which I won't bother too learn since I'm a console-guy) I would mod too add content, rebalance certain skills, cap the smithing improvement at 100+ corresponding perk, make a non-Dovahkiin intro too the game for those who do not want to be the Dovahkiin in RP, allow the player too craft Skyforge Steel at the Skyforge, etc.
I can't, however, speak for what others would do.