As I see it, it's a plot device to give MC a reason to further investigate RM with the goal to expose it and/or bring it down before Sakura thinks Rachel's training is complete and before she could be forced on other people via blackmail. Otherwise you would have at least some players going "alright, I freed Rachel, I don't care anymore about RM, i never want to hear about it again." I think that bringing RM down (at least on the love route) is an integral part of the story Moochie wants to tell.
So yes, Rachel is in danger of eventual ntr, MC is strongly motivated not to let this happen, story continues. I wouldn't worry.
Yeah I suspect you are right about that and fact RM may play an important part on the corruption route of MC as well.
Personally I think for me this game would be better and more enjoyable if RM and Dad were not a part of game at all and that it only adds more stalling and extra work until those storylines have played out for some of the most important people in the game.
Plus game would likely work better for
my purposes without them since I am more interested in the relation with the girls developing as a crime story
, but it is Moochie's game and not mine and to her that part of game is important and about what she wanted to do with the game. So it is there to stay and let us hope that in the end the payoff for including it will work out for her.
For me, I kinda liked the helping Evelyn storyline with Alice threat, especially since it was finally a non sexual threat by others way to show a LI that you had their back and cared for them and would have loved it if the other lines would have been more like that. Instead of the all too common threat in games like these you have to safe your girls from sexual predators or prostitution that RM, dad and Mr Robinson all prey upon, but that is just me.
Basically I decided to hold off playing the new updates until the game will have passed both the RM and dad storylines and there will be serious development for both Rachel and/or Evelyn moving forward, since I know I will not really enjoy the updates in between and this game is too good to put it aside since in the meantime you do not really like the updates until some compulsory storylines have developed far enough.