More or less this. Einsatzgruppen would still exist to deal with partisans, intelligentsia, mental patients etcetera. As the war progress the Einsatzgruppen would become more and more genocidal by every year. After a partisan attack villages in the area would still be purged, Jews will be targeted with or without an order from Hitler himself. If Hitler actively tries to limit the killings (ASB) there would be less killings and the Einsatzgruppen might be defunct.
As mentioned, the logistical requirements deep in USSR would create a situation where Hitler would have to chose between giving the food to Germans or to Slavs and Jews. Who would he chose?
In the end, more Jews would die by starvation and overworking in Ghettos and camps and fewer be actively killed. The end figure would be less Jews killed (especially in the west) but a genocide would still happen.