Where has I, and I believe a bunch of others, really enjoy it when the girls are also involved with each other. Love doesn't subtract, multiplies, or something...
Also, it creates a different power dynamic, one where the MC is part of the whole, instead of being isolated in a leader position. It also means that there's no need for complicated sleep schedules, everyone sleeps with everyone, fucks or not whomever they want.
Instead of your proposed Master/Servants setting is a fully immersed experience of equality. I do really prefer this.
Even if I wasn't a massive fan of Lesbian sex, I am, this is a much better experience and much more rewarding for everyone.
Hey, each of us likes what they like, right?
Peace