Diablo® III

Allow for crafted items to augment already popular item builds

Each Gem type will allow for different class specific affixes

Hellfire Ring (with Topaz)
chance to add APoC (chance to roll this affix should be equal with all other affix, so it stays quite rare to get a really good ring)

I do not play the other classes, but I'm sure with some research something could be agreed upon.

For example CM/WW, etc... with a working item build (not the best) you have Storm Crow, Chant Will for APoC, if say you now roll a hellfire with the APoC you can possibly change your build without having to either have a Chant Will or Storm Crow, or maybe have a Chant Force and Hellfire Ring with APoC...

This would allow for more item builds that work and make it worth crafting to augment current builds.

Someone just needs to spend the time to go through all popular working builds for all classes and develop crafted items that augment them without overpowering them.