Address the imbalance between Faster Cast on rare items and rune words was one of the suggestions I gave as a small change for the new patch.
However, the problem is not with Wand or Orbs. A rare Orb is still usually best in slot for a Sorceress, maximizing damage even above and beyond a Heart of the Oak.
The real problem is with Staves, since they are two handed and so mean giving up Spirit. That’s were additional higher affixes for Faster Cast need to be limited to.
Also, +1 Teleport O-Skill on a Jewel? I think not.