@Hologram Your mockup is really good. I really like the dark gray separator of the layer. I would suggest keeping separator for a unit as in a layer along with its masks etc one. but that is different dicussion 
@Deif_Lou @Hologram the issue with having opacity and blending mode in one line is that opacity bar becomes small and it might be difficult to slide it to desired value due to space being less. Having said that we can try to see it gives any problem.