Take everyone waiting to go and lay them out on your bed or something and make them give you a good reason to continue or a good reason why they might need to go to someone else. Then sleep on it and when you wake up you'll know.
I culled a good half of the older Barbie and fashion dolls I had been keeping, if they said they were ready to go I didn't ask them why. Following whims is why I have the Head Cabinet. There's plenty of them to be all the characters I could ever think I want but they have only 6 bodies to share. A shot glass wrack takes up less room than 2 dozen dolls.