Look at KNG other, relased mod Native DoF and my Toussaint Sharpening mod. They both change env values in-game, you can take one of these mods, look how it's done and just include other env variables in custom mounted env. Then just write some exec functions/create a menu for adjusting the values. You can then save the vars in log and apply them permanently to the env you want in mod editor after you're done with adjusting. Not perfect but much better than this:
1. Edit value.
2. Pack the mod.
3. Start game.
4. Load save.
5. If you're not happy with the results repeat.
And with something like what I described you won't have to restart the game and repack everything billion times.
yeah I will start doing it tomorrow, the thing is I don't have experience with scripting beside html and css, but with copying structures and edit them I should be able to do it, much work, but yeah Maybe I get some help and we could get this achieved.
I already edited envs and know what the variables look like, and god there are many.
(didn't got good results)