This has given me a chance to experience a number of the quests in Storm Peaks and Icecrown and I have fixed a few of the easier ones (missing mobs spawned, some unattackables fixed etc).

As far as heroics go, so far I've been to Utgarde Keep and Azjol Nerub. The regular trash doesn't hit hard enough yet but this will be updated soon.

Utgarde had to be adjusted, Ingvar's timers weren't correct, since correcting we downed him on the 3rd attempt.

Azjol Nerub has some problems with Hadronox, his script doesn't let him move too far away and it's very confusing with him seeing you through the ceiling but constantly resetting. His Web pull spell is backwards (like every web spell in Azjol it seems) and has been disabled. We didn't beat him and I had to disable him for our first run through. Now that he has no 'send player into orbit' spell, hopefully it will be better now. Anub'arek was a challenge but we got him second go.

In general all boss loot drops are double. That means 2 on a normal boss and 4 on a final boss. There should be no duplicate item drops.

More good news, the Tabard championing system appears to be working. If you disconnect and reconnect mid-instance though, you may lose the buff, take the tabard off and put it back on again to restore.

As mentioned previously Naxxramas is open, but I'm not sure how well implemented it is. We will only discover this by testing so when we can muster 10 level 80's well head in and see how it goes.