Morghur not being added to their roster was a painful experience. Big stupid. However, you are primarily listing gods, and there is an argument whether or not further addition of god models would be to the net detriment of the game design. Adding them en masse will cause further disparity between the best and worst god scrolls. There is a certain expectation to be consistent in both design and gameplay. This is hard, and leaves too much room to completely punt the scroll, or make it completely overpowered. In general, it would add too much "Well their centerpiece god model is so much better than mine, boooooo."