Well, about the portrayal of genocides and awfull policies, a mod that do that well is Calm Before the Storm. You pass the racial laws as Nazi Germany, but while the description says that is something "glorious" on a on character way, the focus give you a industrial, stability, manpower and consumer goods malus since you are not hiring and purging these people from administration.
The mod also makes a very interesting portrayal of bad economic policies, of all German routes show until now you can have the strongest war economy possible with the Nazis, but if (or better, when) you stop your conquests you simple crash, while a restored empire under the DNVP has a smaller military industry but it is a rational one that can sustain itself.