I think people are misunderstanding the reason Blizzard changed the way these goggles work. I also think Blizzard changed them in the wrong way. The problem was that the goggles were conflicting with their intention to widen the scope of professions. At the last Blizzcon (I believe), the professions team discussed their desire to take away BoP items that were forcing people to become a certain profession for min/maxing. Hence they made all epic crafted items BoE from Blacksmithing, Leatherworking, and Tailoring. The only major crafting profession they didn't change was engineering. I believe they kept this because they wanted to continue to make the engineering profession feel unique (the engineering profession does frequently demand this on the forum). However, this is an example of wanting two contradictory things in WoW: to be unique and to be balanced.

Because the powerful engineering goggles were BoP, people had to switch to the profession to get the goggles for the desired PvP effects. stealth detection. This created the conflict of interest they have been addressing in the last two patches. They have been nerfing all the BoP engineering items. While some of those nerfs have been deserved, they could level the playing field a lot by allowing non-engineers to equip those items. Yes, keep the hand and cloak enchants specific to Engineers. Yes, allow only engineers to use flying machines. But there is no reason to keep the equippable Engineering items specific to the engineering profession. They will have to continuously nerf them or people will continue to flock to the profession for undesired reasons.