So... first get all the best girls up to 700+ lvl... by then all new girls will have to "wait" at lvl 50.
I won't bother with new girls for a while. Sure, get those I can without spending any resouces on it... but rest... naaw.
Wich make it a new warp in the gameplay... sigh. Please , stop with the constant adding of new features and spend more devtime on balancing already warped things. Even if it still a fairly simple game... adding stuff all the time affects already existing features A LOT, so they get warped... more and more.
That said... this feature seems like a good add, if it only was for girls ABOVE character level.