If waist trimming is not an option (wich i understand its probably tedious to implement), you might just wanna make them have stronger versions of posture training (while cursed) than other items - > faster hip widening.

Height reduction: i agree, lets drop this idea. Or if you actually wanna implement it, cap it before it reaches questionable stages.

Interracial class:

Objective should vary depending on hybrids

Base Queen of spades class: scales with interracial tattoos. Downside: cant resist blacks and will always kneel in their presence. Also gets buff if plugged with mamba. (you could also make it about avoiding white cock but theres already a tattoo for that and its the only black cock tattoo i avoid because it ruins the dominatrix, one of my favorite npcs)

Plus adding the following to hybrids: Black breeder (qos+fert goddess) : scales with total amount of black babies born Ghetto fucktoy(qos+Silicone queen) : every black orgasm received grants a one time "drop agression pass" against white none beast actors. ("sorry hun, i dont do whiteys") Beta boi(Qos+Sissy) : scales with ass size and decreasing cock size, the smaller it is, thr bigger the buff (or could scale with turns spent in chastity)