Okay, I'll start...
They are ... ummm ... well how about simply they aren't very good and I would question their overall usefulness.
The first problem is Cleric aren't just healers in todays live version of the game. No matter which one of the three trees I choose as a main tree my character has to be a healbot.
On Live my cleric 17 / Fighter 3 / Epic 3 - you know a War Priest - the character has an 85 AC, 5% dodge, 1890 Spell Points and 564 HP. I cannot come close to matching that the Lamannia build, I know I put a lot of effort into my characters layout for live and so far about 30 minutes on Lamannia so maybe I am missing something. If I move one close to that level something else drop to an unacceptable level.
I figure I would need another 40 Action Points to make the same character.
The next problem is so many things have threat modifiers increase.... how about decrease threat modifiers?