I played it and I must say that I don't think the data you may automatically receive from the analytics could in any way really reflect the players real attitude towards the characters. To be specific, I am currently most interested in Bella, but because she has still little content in-game, her variables are low, so just by looking at my variables you may get the impression that I'm the most interested in Shirley, which is false, because I only consider her a fun good friend, and do not wish to go on her love route, I just have gathered more points because she has more content, and because I found the other girls personality rather unpleasant for now.
Anyway, options are good. This game has a lot of choices, and a lot of characters. It doesn't feel linear at all. The feeling of freedom of choice this game provides it totally awesome, but I don't really think you can develop in parallel all the girls routes, so, the sad thing I guess is that either way the new versions will come out maybe yearly twice or you will abandon developing some of the girls routes.
You didn't specify which of the girls are main characters and which of them are subcharacters , so maybe are you planning to decide it now based on the data you gather from analytics? I have a bad feeling about this. The data you gather may point you in the wrong direction.