So far I like Kimi the most (talking about rework), very loverly girl, can't wait to romance her.
Samantha and Chloe would my next picks.
Sam is a very caring one, like Milton said - I also expect her path to be very wholesome/romantic.
Chloe is fun, also it feels like there might be some 3some/throuple route down the road with Kimi, while I am a solo player, for some reason I am curious about this path. Not saying it will be my main route of course, solo is always in priority.
As for Olivia, nah, I don't feel any attraction to her, I see her as my sister, she's fine, but other LIs are better (only my humble opinion of course), I wouldn't switch anybody from main LIs for her.
P.S. Also I admit that Developer making some teasing special renders with Olivia might be deceiving some players, especially new ones, who has no clue that she is not an actual LI.