Disagree on Cara/Nikki, the only unsafe decision is Julia, anything else flies under the radar with them.
Poor Cara even meets Erynn and Alexis and says "they are so cool", poor girl.
Nikki at least knows to instantly dislike the girls she meets, Erynn and Val
.
Layla and Alexis is also a choice that needs to be made... going with Layla is a bit better, afterall you can get the Layla path even after banging Alexis several times, and by doing that you leave Alexis sad and broken that the guy she likes dumped her for her little sister, that's chefs kiss scumbag perfection.
Choosing Alexis creates no immediate friction, Layla moves on pretty easily... but as a consolation you can cheat on Alexis with Val, Tori, Nikki/Cara, flirt with Erynn and Iris and even her fucking mom... so i see plenty of heartbreak in the girl's future.
And you forgot Gabi, Gabi always stays available for fucking around