Understood about what you meant by making them demons. Though you certainly remember that St.George, being slightly higher in level than the above-mentioned bishop, still used his lance, not holy words.
I certainly agree that "Dragon" tag would be very good. Though I think that they won't implement it until Dom4 in any case...
In any case more dragons would be good. Especially if they can partly fill up the niche for endgame summons for paths other than Death and Blood!
I take it that you are also making them one-of-a-kind, right?