Yup a drake will definitely run things. But I think in the absence of a drake, the dominant duck will take the lead. When I just had my two girls, Tella made all the decisions and Ettie followed. Now Kaine rules over all.
The girls are just having fun. I have two drakes and in the spring my girls still do what we call "the dirty ducky dance". Sooo what I am saying is that adding a drake won't necessarily remove the behavior. All the reasons you chose not to have a drake are still as valid. I would say unless...