This, I understand it partially...
(gaining experience in e.g. fitness makes it harder to gain experience in intelligence or charm and vice-versa, defies logic. I would expect gaining experience in fitness to make harder to level up fitness and not the but anyway it's a tranfrormation game so logic does not have place
)
But I was not asking that. I'm saying that you should apply the "moded" multiplier only on eg. levels 8,9 and 10 (for the average personality) and keep the default mutiplier as is for levels 1-7.
Mutatio and cheats were created because some settings are unbalanced and yes can be fun, but at the same time make the gameplay experience not that great. With the same logic I could make a small mod to click and trigger the event you want but it would not be a sandbox game anymore but a visual novel...