In my humble opinion, these Rings need to scale with level well enough to match the Competing AH Ring. There, I said it and I'm standing by it Seeing the additional effects of the Rings would be NICE but not at all necessary (mmmm /dream of Rajas Ring with STR/DEX +10, Store TP/Subtle Blow+10... /dream off)
but yes, these Rings should be the best ring we can ever have in that one slot(for their respective purpose) and I dont think anyone can disagree with that

Very happy that the Developers are looking into it tho