The lionesses were starving and thought Simba was dead. I just thought some would have attempted a revolt or escaped in groups from desperation. Of course, thankfully, Nala does find Simba and pushes him to fulfill his journey.
The deleted brother character was named Mheetu (I know) and was supposed to have been the only other witness to Mufasa's actual murder. In my head, I figured he would either leave with Simba or stay with Nala and spill the beans with her. As cubs, that would just mean they not talk if they were to protect themselves from Scar.