Looking over the Game Systems Panel notes from Blizzcon, I can't help but think of Elder Game's take on the abortive hunter ammo revamp of patch 3.1. Though there were good reasons to change the system, the results failed to address most of the major issues while leaving the game littered with obsolete crafted and quest reward quivers and ammo pouches. As a veteran of AC2's live team, Eric concludes that this is the sort of thing that the enthusiastic new guy decides isn't going to fly anymore now that they are in charge.
The Crab is correct when he concludes that Wrath era itemization has become a complicated mess. He's also right when he says that the generic 1% crit per point talents are less fun than tree-defining talents like Juggernaut. These are issues that could make rolling new alts to take advantage of the Cataclysm revamp more difficulty.
Though these changes aren't bad in principle, the challenge will be in the implementation and testing. Who can predict where classes will be in terms of power level once you redesign the entire basis of the talent system and simultaneously re-itemize every single piece of gear in the game? If obsolete quivers are what we got from a simple change to hunter ammo, what will fall through the cracks should this ambitious effort fall short?
In the end, it appears that everyone's favorite system designer was not to be left behind as all of his colleagues conduct massive overhauls of their respective areas of the game. The Crab's efforts may not be the most visible - they're not flashy like new races or dramatic like upheaval of the very continents - but he might have bitten off the biggest challenge on the Cataclysm agenda.