Put simply, if critical damage-stacked builds are more effective than other approaches, the build diversity decreases. As we work to increase support and teamwork between players throughout the game, we examined how we could change critical damage to retain it as a fun and viable approach to build-making while also allowing other builds to shine.
But damage is still the end all, be all. This hasn't really changed much except maybe mixing your gear up a bit, and even then, the playstyle and approach to content will remain the same. And what do they mean by "support"?