These are all a great idea. However … with the priest tier set bonuses, in order for our 6 piece set bonus to be useful we NEED the 4 piece bonus as well. For instance, in order for “Soul of the Zealot” which is spirit tap increasing shadow damage to work it REQUIRES its corresponding " Soul of the Spirit Font" the ability to get spirit tap during boss fights or to trigger it with Inner Focus to work. Other wise both are useless. I suggest you combine them. The same thing happens with our Oracle set. we need to 2 piece set bonus in order for the 4 piece to be useful.
Both of these tier sets completely change our play style. If you want use to choose a play style which is what I am gathering based off the tier 3 set bonuses then at least for Shadowpriest they need to be looked at again.