Whilst my opinions have not changed in regards to the Czerka Protocol Officer's head being generic, I did go ahead and change Sharina Fizark's head so that she uses another generic head.
With the new direction I'm taking the mod in, there's a high chance I'll be covering Sharina again in one of the future optional installs (Right now I've added Player Head Commoners).
Hi, I hope this isn't overstepping, but I think the issue with the NPC Diversity patch might be in the [GFFList] section in the changes.ini file in the Diversity folder - I changed the instances of "Replace1/2/3/4/5" in this section with "File0/1/2/3/4" and was able to install the patch without reporting any warnings or errors. Using a test save, the appearance of the rodian clerk in the Tattooine Czerka office matches your picture above.