I tried putting the 520-7 APL (modified to my exact toon where applicable) into the 520-6 simcraft since 527-7 isn't out yet. I have a thunderforged normal lei shen trinket with 2pcT15 and 517'ish ilvl.
http://us.battle.net/wow/en/characte...Werst/advanced Just copy/paste 7's APL into 6 once you import then just tweak the specifics to your professions, spec, race, etc.
Its showing a major gain vs the 520-6 APL which is expected. I ran various sac vs service grimoire permutations along with imp glyph vs no imp glyph. Right now sims predict service with imps sync'd to darksoul as still slightly ahead of sac but sac is far closer than it was in past sims. If you don't sync imps with darksoul it predicts its a loss for the glyph in all cases. Possibly with 4pcT15 it will catch up or maybe not till heroic ilvl.
Also we've been working on h.meg all week and my testing on multi target fights has service being way ahead. Yes 2x autocrit dooms are nice but a double spawn of wyrms vs a service felguard pulls ahead in practice. I did a council fight as sac and came in world 20'something (now in the 40's) and though I played well I know I didn't play perfectly so its clearly strong in certain circumstances. Right now service and sac are close enough you can play whichever the situation and your playstyle prefers. That is actually a really great place for demo to be in.
Without getting too /tinfoil hat on things I hope GC doesn't nerf sac for demo simply because its now sometimes useable or a legit equal option to service. Keep in mind the bis simC profiles of service felguard vs sac are less than half a percent apart. That is well within the "noise" of RNG and actually really solid balance work by blizz.