I don't have a problem with the drop rate. I don't have a problem with doing the same dungeon over and over. If it's becoming boring for you then you can set yourselves your own challenges. Try and shave a little off your time each run, or try it with different strategies or as a different class to your usual one. Spend time teaching people new to the dungeon how to do it. The drops will come when they come. I enjoy playing the game, thats my drop.