I'm for bringing back kidnapping. I mean, hey. You're, ah... 'recruiting' monster girls for your cause. It's only fair that they do some 'recruiting' as well. Might need to run a mission to find them and rescue them from a prison, or some form of... entertainment. Possibly even rescue them from a training facility of some type. Or maybe, if you take too long, you have to recapture them from a squad.