Would it make sense to set a limit on characteristic values formplayer characters ?
Something based on the starting value of a character?
I think starting value +30 would be a good limit, so if I start with Strength 38, I can get up to Strength 68 as my personal maximum.
This however does not change the limit on the maximum characteristic advances, which should stay at 1 time per rank.
In this way, the limit may not be broken, but you can restore characteristic losses; an additional benefit would be, that a characteristic loss not necessarily damages your reachable maximum.
What do you think ?