Yep – we do all our own stuff. Sometimes we find slightly different things than other people, but usually it’s pretty similar. Where you see the most differences are for specs that other people don’t simulate (tanks and healers) but that we do. Healers and tanks also tend to be a lot more subjective anyway, so it’s hard to get anyone to agree on the one best way to play (and we don’t really think it’s necessary for people to agree – there’s lots of ways to play healers and tanks that work just as well).
We have a beta of the simulator part for Shadowlands, more details here: Shadowlands Simulator Beta
Not all specs are done yet, we’re releasing them as we finish them (Druids should be available sometime today or early tomorrow).
The optimizer is still a work in progress – I hope to do a beta of the pre-patch gear optimizer before the pre-patch to test it out a bit. Then the pre-patch itself always acts as kind of a “live test” for Shadowlands itself (both for Blizzard and for us).
So we’re getting there – it’ll come down to the wire as with every expansion because Blizzard changes things right up to the last minute, but we’ll be ready!