What will the new customization be like

as we know the reach styled customization is going to be back,how ever they also said that they are going to add to that,for better or worse,i dont know though if it is better what new features would they add to make it loved even more.

I hope that they allow you to customize your hud but let me know what you want.
P.S yes i know the hud would be annoying to customize but after seeing that 343 wants to revive the franchise after ahem halo 5 they would probably want to do something diffucult