Yes ...the Dev has really introduced a lot of hot and interesting women in the game. For me as Dev it would be diffiult now to choose which of them i give more weight. You are right Nikki and Cara seem to be important to the Dev too because she gave them a lot of time in chapter 9...i think this was also a whish from community to let them appear again. Now she can think about a story where Cara or Nikki will be pregnant in later chapters...
.... But i must also confess after many different playthroughs that these hot female overhaul in the game gets a little strange already especially when every girl/woman seem to have a crush on MC like he is the only guy in town....It would be more exciting to get some male friends so that there is a little competition who gets which girl or something..for example in the truth or dare game you could let a girl u dont like things do with Zach or something like that..or may generate a couple out of them..