@Glitterati3D: The background was someone's suggestion and it's a new idea for me for promos (like Daz3D does), it will be faded as well as blurred out (like depth of field).  In fact, I'm gonna go ahead and do that on this sample to show you.  Not sure what you mean by the hair being flat and too shadowed, can you explain?  Does it need more specular?  Bump?  I like this hair and it allows me to show Tina's full face without any hair in her face or covering too much of her forehead.

You're losing site of your single purpose - to show off your character.  There's so much in that image, there's not even a way to determine what it is you're trying to sell. Promo your CHARACTER.  Nothing else.

The hair......I like Ali's stuff too, but certainly not for closeups and not for promo renders.  It looks like 3D hair.  There's a shadow on the top of her head in the back - hair doesn't do that, and certainly not that pitch black shadow that leads your eye to it wondering what the heck in in her hair!  The side in front of her ear look like painted on hair.  Bad choice - but your insistence on IDL is leading to those mistakes as well. Did you at least turn off the light emitter on the hair?

IDL is tough lighting to begin with.  Using it in promos is gonna be a hard sell.