I personally think he's bad design.
Phase 1 and Phase 2 are actually pretty fun and pretty well done. They had some interesting elements to the fight that makes him more than just another dragon fight.
However, Phase 3 is where things get dicey. While I assuming some people probably enjoy phase 3 because it's new and unique... this to me go back to one of my general issue with this expansion: Blizzard is a bit to enamored with their new vehicule design.
I don't know about you guys, but I didn't get to level 80, study my class, learn how to play it, gear myself up and farm for consumable in order for all of that to be made irrelevant for 1/3 of the boss fight and have my ability list go from 15+ to 6... This is also how I feel about Wintergrasps, Strand of the Ancient, Occulus and about a dozen dailies - vehicles were fun the first 5 times or so, now they're just annoying.
So here we come to Malygos, who technically is the 'last boss' of the current content patch we're in... and all he devolves into is some kind of extremely gimmicky fight where things such as 'A good of a Rogue/Mage/Warrior/etc are you?' or raid composition, or raid buff, or what not don't mean squat... all it is, is how good are you at controlling a dragon and adapting to having 6 'new' abilities.
Yes, I'm aware that you can (and should) do Ace High in order to practice with the dragon. And I did. I'm a quick study, I had no problem learning it and that's why I got Malygos killed in 10 man with no real issue, but not everybody is like that, and it really sucks to be failing because some people aren't 'good enough' at something that ultimately has no real impact on how they play the rest of the game - controlling a freaking dragon.
Toss in that with all those dragon flapping their wings, the crazy moving background, the huge effect he tosses around, Malygos is low end system killer, making many people's visual lag go through the rough during that phase. Fun Fun.
All I got to say is I hope Blizzard get over their vehicle gimmick sometime soon and that Ulduar isn't about driving a tank to shoot down Yogg-Saron...



