....yay
I assume they want to steer clear of increased sac damage due to the cluster that was our scaling in MoP. Well, that's fine, but here's an idea:
You are now able to maintain your control over even greater demons indefinitely, allowing you to summon Doomguards and Infernals as permanent pets. Does not cancel the benefit from Grimoire of Sacrifice.
There, now it can at least coexist without being a trap, and the DG/Infernal prolly will benefit from whatever crit% bonus (or whatever) they end up giving us for a sac bonus.
Side bar, since Demo's Sac at this point keeps the pet and cuts the caster's crit to increase the pet's crit, this could actualy be a viable combo...
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It makes sense to me. Also, I found his tweets on the subject (and by extension, yours =P )