Never mind guys I just found a solution as I had a bouncing hair problem in-game after converting FIFA 16 faces to FIFA 15. All you had to do was use the FIFA 14 to FIFA 15 converter by Moddingway and convert the 3D hair file. Then, you go into CM15 & import the converted 3D hair file but for the hairlod, just use the FIFA 15 hairlod instead of the FIFA 16 hairlod. Now you're done! Just play a match & see if the problem was resolved.
P.S. I think it was amandeep who posted a reply in esQzme's thread saying something about testing both FIFA 15 & FIFA 16 hairlods which made me test it out so thanks to him!