As an avid dungeoneer since early Vanilla, I made sure to carefully handpick classes and specs to bring to Mechagon when I went there tanking for the first time...
...And boy what a time we had! We were roughly around ilvl 400 and everyone actually made sure to get to know each other a little bit as we waited for the group to fill up(The process took about 30 minutes to get the right composition going). By the time we pulled the first boss, we had no prior knowledge other than logic and a thirst for adventure, and we all talked about thoughts towards the new dungeon as we cleared trash, learned what hit like a truck, what dispels must be made, things to avoid and it was all in a positive tone.
The fact that nobody had been there before forced us to work together to solve the tactics of the boss, figure out what they were(without looking too much in the adventure guide) and we had a blast doing boss after boss!
There was no toxic comments, failure was greeted with constructive feedback that was positively taken and improved upon new attempts. Even failing over and over on a boss because a person had a hard time dealing with the mechanics prompted forth creative solutions(which there can be many of in this dungeon!!
) to help out that player to finally succeed in their task and feel the rush of overcoming obstacles together with the rest of the group.
At the end, everyone thanked each other for a fantastic 2.5 hour clear in a vast mechanic journey, exchanged btags and talked about not having this much fun since vanilla, bc or wrath. It was truly a magical journey in many different ways for me and my party members!
So thank you, Blizzard - you created a solid, inspiring dungeon! I really hope you will include more mega-dungeons in the game; something for the adventurous adventurer to indulge in and make new friends with.
After all - this game doesn't lack things to do with your friends... it lacks things that will help you get them.
Edit PS: Mechagon is not overtuned. It's a megadungeon where bosses is basically mini-raid bosses with simplified tactics. I will admit 1-2 bosses could have another mechanic thrown in to add more suspense, but I'm really being picky now :P