OK, so when people first started imbuing shards and putting them together with the rings, a dev, I believe Eladrin hinted we'd not learned everything about them yet.
Then for monks, it was implied, again, by Eladrin that monks had a special benefit.
Now, as I understand it, monks get the Tier 3 WEAPON effect applying to their handwraps, while others (or those not using handwraps) have the accessory effect. Is this correct?
Someone in party discussing it said maybe if, for instance you do POM you might get the regen AND the healing amplification effect if you were a monk using handwraps. Figuring out how to BEST upgrade my rings for my characters, monk and non-monk is now what occupies me since the raid's down and its time to just make my characters complete.
Also there was the theory that having one ring with earth, and the other with holy (if you grind for and get two perfect sets) would produce mineral II like effects (transmuting, etc)