I agree that macros are useful, and RPPM trinkets almost always proc on the pull if you have been out of combat for a little while. That being said, I feel like other than having the buffs macro'd in that the demonology opener is simple enough that the macro isn't really necessary. Not like it was in Cata. I don't feel overwhelmed by it, especially now that you can fit in most of the instant abilities inbetween the first 2 HoG's and 2-piece allows you to be in meta for most of its duration very quickly.