Help needed on rejected Logo

I was hoping if somebody could give me some advice on improving a logo thats been rejected. The feedback the reviewer gave me was “An interesting concept but the design here is a little too basic and simplistic.” I’ve put a lot of work in this logo, I’d really want it to get approved, any help is welcome!

Hi… Great work on the face, maybe you should do something about the hair, it looks rushed, maybe make it in one wave style… Also, this looks like an ordinary vector silhouette, so that may be a reason for rejection! when it comes to logos a silhouette just wont cut it :/

Its true that it looks like an ordinary vector silhouette, I could make more variations and sell them as a vector bundle instead, thanks a lot for the feedback!

...I think that would be the best : ) Good luck man!