Can nUI6 unit frames be customized?

[haremxnoxjutsu]

I was just wondering and wasn't sure where to ask but will it be possible to customize the unit frames in nUI 6? For example, can we remove the 3D-portraits and resize and omit or change the lengths and widths of bars and etc?

If possible could you maybe make a list of what aspects of nUI we will be able to customize once nUI 6 comes out?