Like it's done in, for example, Total Commander and even in Explorer when it's set to Table view. So we will be able to arrange them by: happiness, tiredness, preg status, health, day job, night job... maybe something else if it will be useful.
As i understand, the girl's position in the list defines her chance to get some clients now. Don't know if there will be any changes to this in upcoming update(i saw something about assigning an unique identifier to avery girl and item, but dunno if this will be implemented or not), so i don't know if this can be done. But it certainly will help when you need to do a lot of micromanagement, in late game especially.