As of this last weekend (June 29th), all 8.2 essences and gear were implemented in the simulator. Go ahead and try it out if you want to do some hardcore theorycrafting and simulating!
We will post a site update later tonight (July 2nd) with a few bug fixes (in particular an error a few people have been getting when doing Best in Slot mostly). This will also prepare the site for gear ranking updates.
Tomorrow (July 3rd) we will update gear rankings for many (maybe all?) DPS specs. If time permits, we will also do healers and/or tanks.
If we don’t get to healers/tanks tomorrow, we plan to update them on July 4th.
These gearing strategies will be a first pass based on the spell data we have been able to obtain. Especially some of the trinkets from the eternal palace and mechagon will probably need some in-game testing and tweaking to get a rock solid ranking. We’re also sure that some of the essences will be re-balanced by blizzard, or people will come up with really clever ways to use them, etc. We’ll spend the remaining days leading up to start of the new raids and season 3 testing things out. Then we’ll do another round of tweaks after the first week of raiding, when we can get real in-game data for some of these new effects.