Has anyone developed a successor to these mods? originally XSO, then GSC "Game Setting Customizer" with the tweakable INI settings? I used this mod with my game but it has essentially been abandoned and I am unable to continue playing with my current character because the mod is no longer supported and doesn't work properly apparently.

There's http://skyrim.nexusmods.com/mods/814 that can be used to edit ini settings.

This is different I believe... The GSC/XSO included an ini that would tweak gameplay settings specificly.

The community uncapper has many of XSO's best features these days. I also saw a mod within the last week that implemented an XSO-like leveling curve, but I don't remember what it was called.

Edit: Had to go find the http://skyrim.nexusmods.com/mods/18216.