Great, thx.
I don't know how complex the following would be, so just an idea, but what I would really like is a formula that is based on a "basePenalty" if any Kerbal is lost on a mission, multiplied by a "perKerbalPenalty" based on the number of Kerbals killed. My basic idea is that the reputation loss is more based on the fact that a mission went horribly wrong and a Kerbal was killed at all, than the question whether it's 1 or 3 or 10 Kerbals.
Example with numbers:
If that's too complicated, the configuration of the present penalty factor will do, thanks for your effort!