I would also work on the facial expression of your models. The first girl featured with the dark hair has a very goofy looking smile- not to offend anyone, just being totally honest. If you could direct her to smile with her eyes and not so much with her mouth- especially that sideways smile, I think that would improve things. The other model you have- the one with the red hair- looks as if she smelled something unpleasant in most of her photos.
Those issues accompanied with the lack of processing and flattering lighting are really hindering your work. I would definitely slow down and not charge anyone for quite some time until these issues are worked out.