For Dragon Age 4 it would be vital to have one female LI that is extremely attractive to the highest degree, the very definition of physical beauty and perfection, then make her romance-able by male or female. Then make the game moddable so people can fine tune her appearance in regards to skin tone, hair, etc.
Please, think about what you're saying. You're asking BioWare to create a female character for the sake of romance, so she can be modded to players tastes. 
By the way, a mod toolset makes no difference here. DA2 didn't have one, but the modders found a way. There is mods out right now for DA:I. If you feel so strongly about this, take a page from the current modding community and find a way. They can, you can.
It's not BioWare's responsibility to give you a LI that's essentially a dress up doll for the player to have virtual sex with. Talk about sentences I didn't think I'd type out this morning...
That's it. No more BSN until I've had at least two cups of coffee.